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All questions of Humans as Organisms for Grade 6 Exam
Backbone consists of- a)13 vertebra
- b)23 vertebra
- c)43 vertebra
- d)33 vertebra
Correct answer is option 'D'. Can you explain this answer?
Backbone consists of
a)
13 vertebra
b)
23 vertebra
c)
43 vertebra
d)
33 vertebra
|
Athira Basak answered |
Backbone of human being consists of 33 vertebra placed one over the other.
Which of the following part of body help in movement?- a)Organ and skin
- b)Muscle and bone
- c)Muscle and skin
- d)Organ and bone
Correct answer is option 'B'. Can you explain this answer?
Which of the following part of body help in movement?
a)
Organ and skin
b)
Muscle and bone
c)
Muscle and skin
d)
Organ and bone
|
Aashna Ahuja answered |
Muscle and bone together helps in movement in body parts.
The total number of bones in the human skeleton are- a)206
- b)296
- c)106
- d)196
Correct answer is option 'A'. Can you explain this answer?
The total number of bones in the human skeleton are
a)
206
b)
296
c)
106
d)
196
|
Saikat Malik answered |
There are 206 bones in the human skeleton system in all in adult human beings.
How does an earthworm move through soil?- a) By jumping
- b) By slithering
- c) By flying
- d) By burrowing
Correct answer is option 'B'. Can you explain this answer?
How does an earthworm move through soil?
a)
By jumping
b)
By slithering
c)
By flying
d)
By burrowing
|
Coachify answered |
Earthworms move through soil by slithering using muscle contractions to extend and shorten their bodies. This movement allows them to navigate through the soil efficiently, aiding in aerating the soil and enhancing its quality for plant growth.
The joint which helps in rotating a body in all directions is called _______- a)Hinge joint
- b)Ball and Socket Joint
- c)Pivot joint
- d)Fixed Joint
Correct answer is option 'B'. Can you explain this answer?
The joint which helps in rotating a body in all directions is called _______
a)
Hinge joint
b)
Ball and Socket Joint
c)
Pivot joint
d)
Fixed Joint
|
Shaila Patel answered |
The ball and socket joint, the bones can be turned in any direction i.e. forward and backward, side to side and even rotated. The ball and socket joints occur at the shoulder and hips in our body.
Snail moves with the help of- a)Whole body
- b)Bone
- c)Shell
- d)Muscular foot
Correct answer is option 'D'. Can you explain this answer?
Snail moves with the help of
a)
Whole body
b)
Bone
c)
Shell
d)
Muscular foot
|
Arjun Desai answered |
A snail uses its single long, muscular foot to crawl on a layer of mucus-like slime that it secretes. ... The waves move much faster than the snail itself, and generate enough force to push the snail forward.
Which of the following joints and their parts enable a bowler to bowl, while playing cricket?- a)Ball and socket joint at shoulder.
- b)Hinge joint at elbow.
- c)Hinge joint at shoulder.
- d)Ball and socket joint at elbow.
Correct answer is option 'A'. Can you explain this answer?
Which of the following joints and their parts enable a bowler to bowl, while playing cricket?
a)
Ball and socket joint at shoulder.
b)
Hinge joint at elbow.
c)
Hinge joint at shoulder.
d)
Ball and socket joint at elbow.
|
Manasa Chauhan answered |
Our shoulder has the ball and socket joint that allows circular movement. When you bowl while playing cricket, you rotate your hand in full circle.
Which parts of the fish helps it to move forward?- a)Hands and fins
- b)Legs and fins
- c)Gills and fins
- d)Fins and tail
Correct answer is option 'D'. Can you explain this answer?
Which parts of the fish helps it to move forward?
a)
Hands and fins
b)
Legs and fins
c)
Gills and fins
d)
Fins and tail
|
Anoushka Sharma answered |
Fins help the fish to move in water. The forward movement of the fish starts with front and sideways push of the tail. The flexible and strong tail fin of the fish pushes the water and propels the fish forward.
Which body system holds our body upright?- a)Circulatory system
- b)Muscular system
- c)Nervous system
- d)Skeletal system
Correct answer is option 'D'. Can you explain this answer?
Which body system holds our body upright?
a)
Circulatory system
b)
Muscular system
c)
Nervous system
d)
Skeletal system
|
Sagar Mehta answered |
The skeletal system is the framework of bones that support our body and keeps it upright.
How many bones are in the human skeleton at birth?- a)Around 100 bones
- b)Around 206 bones
- c)Around 300 bones
- d)Around 400 bones
Correct answer is option 'C'. Can you explain this answer?
How many bones are in the human skeleton at birth?
a)
Around 100 bones
b)
Around 206 bones
c)
Around 300 bones
d)
Around 400 bones
|
Keystone Instructors answered |
- When a baby is born, their skeleton has around 305 bones.
- As they grow, some of these bones fuse together, and by the time they become an adult, the number of bones decreases to about 206.
- This is because some of the smaller bones in a baby's body fuse to form larger bones as they grow older.
- So, when we are born, we have many more bones in our bodies compared to when we are all grown up.
The number of bones in an adult skeleton are ------------ a)200
- b)225
- c)300
- d)206
Correct answer is option 'D'. Can you explain this answer?
The number of bones in an adult skeleton are -----------
a)
200
b)
225
c)
300
d)
206
|
Anjana Rane answered |
206
It is composed of around 270 bones at birth – this total decreases to around 206 bones by adulthood after some bones get fused together. The bone mass in the skeleton reaches maximum density around age 21. The human skeleton can be divided into the axial skeleton and the appendicular skeleton.
Which joint allows movement in one direction only?- a)Ball and socket joint
- b)Hinge joint
- c)Pivot joint
- d)Gliding joint
Correct answer is option 'B'. Can you explain this answer?
Which joint allows movement in one direction only?
a)
Ball and socket joint
b)
Hinge joint
c)
Pivot joint
d)
Gliding joint
|
Moumita Desai answered |
Hinge joint allows back and forth movement only. Bones in the knee, elbow, finger, and toes have hinge joint.
What characteristic enables birds to fly?- a) Hollow and light bones
- b) Strong shoulder bones
- c) Modified forelimbs as wings
- d) Muscles of flight
Correct answer is option 'A'. Can you explain this answer?
What characteristic enables birds to fly?
a)
Hollow and light bones
b)
Strong shoulder bones
c)
Modified forelimbs as wings
d)
Muscles of flight
|
Subset Academy answered |
Birds can fly due to their well-suited bodies, including hollow and light bones that aid in flight. These specialized bone structures make them lightweight and efficient for aerial movement.
Which of the following organisms has a backbone?- a)Spider
- b)Starfish
- c)Snake
- d)Snail
Correct answer is option 'C'. Can you explain this answer?
Which of the following organisms has a backbone?
a)
Spider
b)
Starfish
c)
Snake
d)
Snail
|
Arshiya Sen answered |
Snake has a backbone. The animals with backbone are called vertebrates.
Which joint is present at the knee and arm?- a)Ball and socket joint.
- b)Pivot joint
- c)Hinge joint
- d)Fixed joint
Correct answer is option 'C'. Can you explain this answer?
Which joint is present at the knee and arm?
a)
Ball and socket joint.
b)
Pivot joint
c)
Hinge joint
d)
Fixed joint
|
|
Anoushka Sharma answered |
The bones in elbow have hinge joint that allows only back and forth movement.
Why are bones crucial for movement in the human body?- a) To provide protection
- b) To store minerals
- c) To produce blood cells
- d) To serve as anchor points for muscles
Correct answer is option 'D'. Can you explain this answer?
Why are bones crucial for movement in the human body?
a)
To provide protection
b)
To store minerals
c)
To produce blood cells
d)
To serve as anchor points for muscles
|
Hazel Kamath answered |
To basically provide a place where tendons can attach muscles
How does a hinge joint differ from a ball and socket joint in terms of movement capabilities?- a)Hinge joints offer more flexibility
- b)Ball and socket joints allow only back-and-forth movement
- c)Ball and socket joints have a wider range of motion
- d)Hinge joints allow rotational movements
Correct answer is option 'C'. Can you explain this answer?
a)
Hinge joints offer more flexibility
b)
Ball and socket joints allow only back-and-forth movement
c)
Ball and socket joints have a wider range of motion
d)
Hinge joints allow rotational movements
|
Shiksha Academy answered |
Ball and socket joints offer a greater range of motion compared to hinge joints. The spherical head of one bone fits into the cup-like socket of another, enabling movements in multiple directions, including rotation, flexion, extension, abduction, and adduction.
Why do muscles work in pairs when it comes to moving bones in our body?- a)To provide stability to the bones
- b)To ensure equal distribution of force
- c)Because a muscle can only pull, not push
- d)None of the above
Correct answer is option 'C'. Can you explain this answer?
Why do muscles work in pairs when it comes to moving bones in our body?
a)
To provide stability to the bones
b)
To ensure equal distribution of force
c)
Because a muscle can only pull, not push
d)
None of the above
|
|
Hazel Kamath answered |
Muscles in the bones can only pull on bones not push .
An organism X can walk, and climb on a surface and can also fly in the air. Which organism is X?
- a)Cockroach
- b)Bat
- c)Lizard
- d)Snail
Correct answer is option 'A'. Can you explain this answer?
An organism X can walk, and climb on a surface and can also fly in the air. Which organism is X?
a)
Cockroach
b)
Bat
c)
Lizard
d)
Snail
|
Rishika Chopra answered |
Cockroach can walk, climb and can also fly in air. The muscles in the breast region move the legs for walking while another set of breast muscles move the wings during flying.
Which animal moves by using tiny bristles on its body?- a)Cockroach
- b)Earthworm
- c)Fish
- d)Snail
Correct answer is option 'B'. Can you explain this answer?
Which animal moves by using tiny bristles on its body?
a)
Cockroach
b)
Earthworm
c)
Fish
d)
Snail
|
Edgy Education answered |
Earthworms move using tiny bristles called setae, which grip the ground during movement.
Topic in NCERT: Gait of animals
Line in NCERT: "Under its body, it has a large number of tiny bristles (hair like structures) projecting out. The bristles are connected with muscles. The bristles help to get a good grip on the ground."
Line in NCERT: "Under its body, it has a large number of tiny bristles (hair like structures) projecting out. The bristles are connected with muscles. The bristles help to get a good grip on the ground."
Skeletal and muscular systems work together to enable the body to move. What is the main function of the skeletal system in relationship to the muscular system?- a)To provide attachment points for muscles.
- b)To assist muscles in growth and development.
- c)To produce muscle cells inside the bone marrow.
- d)To produce enzymes that help muscles repair themselves.
Correct answer is option 'A'. Can you explain this answer?
Skeletal and muscular systems work together to enable the body to move. What is the main function of the skeletal system in relationship to the muscular system?
a)
To provide attachment points for muscles.
b)
To assist muscles in growth and development.
c)
To produce muscle cells inside the bone marrow.
d)
To produce enzymes that help muscles repair themselves.
|
Harshad Shah answered |
Skeletal system provides attachment points for muscles.
Which part of your body protects your brain?- a)Stomach
- b)Lungs
- c)Skull
- d)Heart
Correct answer is option 'C'. Can you explain this answer?
Which part of your body protects your brain?
a)
Stomach
b)
Lungs
c)
Skull
d)
Heart
|
Sanchita Kulkarni answered |
Introduction
The brain is one of the most vital organs in our body, responsible for controlling all functions, thoughts, and movements. To ensure its safety, the body has a protective structure.
Role of the Skull
- The skull is a bony structure that encases and protects the brain.
- It acts as a hard barrier against physical impacts, preventing injuries from external forces.
Structure of the Skull
- The skull consists of 22 bones that are fused together, forming a rigid and durable casing.
- It includes several parts:
- Cranial bones: Protect the brain.
- Facial bones: Form the structure of the face.
Functions of the Skull
- Protection: Shields the brain from trauma caused by accidents or falls.
- Support: Provides a framework for the head, maintaining its shape.
- Attachment for Muscles: Serves as a point of attachment for muscles that enable facial expressions and head movement.
Additional Protective Mechanisms
- Beyond the skull, the brain is also protected by:
- Meninges: Three layers of membranes that cover the brain.
- Cerebrospinal Fluid (CSF): Acts as a cushion, absorbing shocks and providing nutrients.
Conclusion
In summary, the skull is crucial for protecting the brain from injuries and damage. Its hard structure, combined with additional protective layers, ensures that the brain remains safe and functional.
The brain is one of the most vital organs in our body, responsible for controlling all functions, thoughts, and movements. To ensure its safety, the body has a protective structure.
Role of the Skull
- The skull is a bony structure that encases and protects the brain.
- It acts as a hard barrier against physical impacts, preventing injuries from external forces.
Structure of the Skull
- The skull consists of 22 bones that are fused together, forming a rigid and durable casing.
- It includes several parts:
- Cranial bones: Protect the brain.
- Facial bones: Form the structure of the face.
Functions of the Skull
- Protection: Shields the brain from trauma caused by accidents or falls.
- Support: Provides a framework for the head, maintaining its shape.
- Attachment for Muscles: Serves as a point of attachment for muscles that enable facial expressions and head movement.
Additional Protective Mechanisms
- Beyond the skull, the brain is also protected by:
- Meninges: Three layers of membranes that cover the brain.
- Cerebrospinal Fluid (CSF): Acts as a cushion, absorbing shocks and providing nutrients.
Conclusion
In summary, the skull is crucial for protecting the brain from injuries and damage. Its hard structure, combined with additional protective layers, ensures that the brain remains safe and functional.
What is the period of growth known as in plants?- a)Senescence
- b)Juvenile phase
- c)Reproductive phase
- d)Vegetative phase
Correct answer is option 'D'. Can you explain this answer?
What is the period of growth known as in plants?
a)
Senescence
b)
Juvenile phase
c)
Reproductive phase
d)
Vegetative phase
|
Swati Verma answered |
The general term for the period of growth is known as juvenile phase.
In plants it is known as the vegetative phase.
The end of juvenile phase marks the beginning of reproductive phase.
Which part of the body is primarily responsible for contracting and pulling bones during movement?- a) Joints
- b) Muscles
- c) Ligaments
- d) Tendons
Correct answer is option 'B'. Can you explain this answer?
Which part of the body is primarily responsible for contracting and pulling bones during movement?
a)
Joints
b)
Muscles
c)
Ligaments
d)
Tendons
|
Dr Manju Sen answered |
Muscles are primarily responsible for contracting and pulling bones during movement in the human body. When a muscle contracts, it becomes shorter, stiffer, and thicker, exerting force on the attached bones and causing movement. This coordinated action of muscles plays a key role in enabling various bodily movements, from simple gestures to complex physical activities.
Which joint allows movement in all directions?- a)Hinge
- b)Pivot
- c)Ball and socket
- d)Gliding
Correct answer is option 'C'. Can you explain this answer?
Which joint allows movement in all directions?
a)
Hinge
b)
Pivot
c)
Ball and socket
d)
Gliding
|
|
Sneha Rane answered |
The correct answer is option 'C' - Ball and socket joint.
Ball and socket joints are unique in that they allow movement in all directions. These joints are found in our bodies and provide a wide range of motion, allowing us to perform various activities and movements. Let's explore the characteristics and examples of ball and socket joints in more detail.
Characteristics of ball and socket joints:
- Structure: Ball and socket joints consist of a rounded end of one bone (ball) that fits into a cup-shaped cavity (socket) of another bone.
- Range of motion: These joints have the greatest range of motion compared to other types of joints, enabling movement in multiple directions, including rotation, flexion, extension, abduction, and adduction.
- Stability: The ball and socket joint provides stability due to the deep socket and the surrounding ligaments and muscles that support the joint.
Examples of ball and socket joints:
1. Shoulder joint: The shoulder joint is a classic example of a ball and socket joint. The rounded head of the humerus bone fits into the shallow socket of the scapula bone. This joint allows movements such as flexion, extension, abduction, adduction, and rotation of the arm.
2. Hip joint: The hip joint is another prominent example of a ball and socket joint. The rounded head of the femur bone fits into the deep socket of the pelvis bone. This joint permits movements like flexion, extension, abduction, adduction, and rotation of the leg.
Advantages of ball and socket joints:
- Wide range of motion: Ball and socket joints allow for a vast range of motion, facilitating movements required for daily activities and sports.
- Increased stability: The structure of ball and socket joints provides stability, preventing dislocation and ensuring proper alignment during movement.
- Weight-bearing capacity: Ball and socket joints are designed to bear weight, enabling us to walk, run, and perform weight-bearing activities.
Conclusion:
Ball and socket joints are unique in their ability to allow movement in all directions. The shoulder and hip joints are prominent examples of ball and socket joints in our bodies. These joints provide a wide range of motion, stability, and weight-bearing capacity, making them crucial for our everyday activities and movements.
Ball and socket joints are unique in that they allow movement in all directions. These joints are found in our bodies and provide a wide range of motion, allowing us to perform various activities and movements. Let's explore the characteristics and examples of ball and socket joints in more detail.
Characteristics of ball and socket joints:
- Structure: Ball and socket joints consist of a rounded end of one bone (ball) that fits into a cup-shaped cavity (socket) of another bone.
- Range of motion: These joints have the greatest range of motion compared to other types of joints, enabling movement in multiple directions, including rotation, flexion, extension, abduction, and adduction.
- Stability: The ball and socket joint provides stability due to the deep socket and the surrounding ligaments and muscles that support the joint.
Examples of ball and socket joints:
1. Shoulder joint: The shoulder joint is a classic example of a ball and socket joint. The rounded head of the humerus bone fits into the shallow socket of the scapula bone. This joint allows movements such as flexion, extension, abduction, adduction, and rotation of the arm.
2. Hip joint: The hip joint is another prominent example of a ball and socket joint. The rounded head of the femur bone fits into the deep socket of the pelvis bone. This joint permits movements like flexion, extension, abduction, adduction, and rotation of the leg.
Advantages of ball and socket joints:
- Wide range of motion: Ball and socket joints allow for a vast range of motion, facilitating movements required for daily activities and sports.
- Increased stability: The structure of ball and socket joints provides stability, preventing dislocation and ensuring proper alignment during movement.
- Weight-bearing capacity: Ball and socket joints are designed to bear weight, enabling us to walk, run, and perform weight-bearing activities.
Conclusion:
Ball and socket joints are unique in their ability to allow movement in all directions. The shoulder and hip joints are prominent examples of ball and socket joints in our bodies. These joints provide a wide range of motion, stability, and weight-bearing capacity, making them crucial for our everyday activities and movements.
What type of joint allows us to bend our head forward and backward and turn our head to the right or left?- a)Fixed joint
- b)Pivotal joint
- c)Hinge joint
- d)Ball and socket joint
Correct answer is option 'B'. Can you explain this answer?
a)
Fixed joint
b)
Pivotal joint
c)
Hinge joint
d)
Ball and socket joint
|
Vp Classes answered |
A pivotal joint is the type of joint that allows movements like bending the head forward and backward and turning it to the right or left. This joint involves a cylindrical bone rotating within a ring, enabling these specific movements.
Why do animals exhibit various ways of moving from one place to another?- a) Due to differences in body structure
- b) To adapt to different environments
- c) To confuse predators
- d) Because they enjoy moving
Correct answer is option 'A'. Can you explain this answer?
Why do animals exhibit various ways of moving from one place to another?
a)
Due to differences in body structure
b)
To adapt to different environments
c)
To confuse predators
d)
Because they enjoy moving
|
Torcia Education answered |
Animals exhibit various ways of moving from one place to another due to differences in their body structure. This diversity in movement methods is a result of their evolutionary adaptations to their specific environments, which dictate how they navigate and survive in their surroundings.
What is the rounded structure on a snail's back called?- a) Exoskeleton
- b) Carapace
- c) Shell
- d) Armor
Correct answer is option 'C'. Can you explain this answer?
What is the rounded structure on a snail's back called?
a)
Exoskeleton
b)
Carapace
c)
Shell
d)
Armor
|
Sankar Saha answered |
Understanding the Structure on a Snail's Back
The rounded structure found on a snail's back is commonly known as its shell. Let's explore this in detail.
What is a Shell?
- A shell is a hard, protective outer covering that serves several important functions for the snail.
- It is made primarily of calcium carbonate, which provides strength and durability.
Functions of the Shell
- Protection: The shell acts as a shield against predators and environmental threats, helping the snail to stay safe.
- Moisture Retention: It helps in preventing water loss, crucial for the snail's survival, especially in dry conditions.
- Habitat: The shell can also provide a microhabitat, helping to regulate temperature and humidity.
Why Not Exoskeleton, Carapace, or Armor?
- Exoskeleton: This term generally refers to the external skeletons found in insects and crustaceans, which is different from a snail's shell.
- Carapace: This term typically refers to the hard upper shell found in some animals like turtles and crabs, but not specifically for snails.
- Armor: While it implies protection, armor usually refers to a more complex structure found in some animals, not specifically in snails.
Conclusion
In summary, the correct term for the rounded structure on a snail's back is its shell. It plays a vital role in the snail's life, offering protection, moisture retention, and a suitable habitat. Understanding the importance of the shell helps us appreciate the unique adaptations of snails in their environments.
The rounded structure found on a snail's back is commonly known as its shell. Let's explore this in detail.
What is a Shell?
- A shell is a hard, protective outer covering that serves several important functions for the snail.
- It is made primarily of calcium carbonate, which provides strength and durability.
Functions of the Shell
- Protection: The shell acts as a shield against predators and environmental threats, helping the snail to stay safe.
- Moisture Retention: It helps in preventing water loss, crucial for the snail's survival, especially in dry conditions.
- Habitat: The shell can also provide a microhabitat, helping to regulate temperature and humidity.
Why Not Exoskeleton, Carapace, or Armor?
- Exoskeleton: This term generally refers to the external skeletons found in insects and crustaceans, which is different from a snail's shell.
- Carapace: This term typically refers to the hard upper shell found in some animals like turtles and crabs, but not specifically for snails.
- Armor: While it implies protection, armor usually refers to a more complex structure found in some animals, not specifically in snails.
Conclusion
In summary, the correct term for the rounded structure on a snail's back is its shell. It plays a vital role in the snail's life, offering protection, moisture retention, and a suitable habitat. Understanding the importance of the shell helps us appreciate the unique adaptations of snails in their environments.
How do humans primarily move from place to place?- a) Walk
- b) Fly
- c) Swim
- d) Crawl
Correct answer is option 'A'. Can you explain this answer?
How do humans primarily move from place to place?
a)
Walk
b)
Fly
c)
Swim
d)
Crawl
|
Rahul Kumar answered |
Humans primarily move from place to place by walking. Walking is a fundamental mode of transportation for humans, allowing them to travel efficiently on land by using their legs and feet to propel themselves forward.
How does a snail move from place to place?
- a)by creeping
- b)By flying
- c)By jumping
- d)By swimming
Correct answer is option 'A'. Can you explain this answer?
How does a snail move from place to place?
a)
by creeping
b)
By flying
c)
By jumping
d)
By swimming
|
Lekshmi Sen answered |
How Snails Move
Snails are fascinating creatures known for their unique and slow method of movement. The correct answer to how a snail moves is option 'A', by creeping. Let's explore this in detail.
Body Structure
- Snails possess a soft, elongated body that is divided into two main parts: the foot and the visceral mass.
- The foot is a muscular structure located underneath the snail's body, which plays a crucial role in movement.
Movement Mechanism
- Snails use a process called "creeping" to move. This involves the contraction and relaxation of muscles in their foot.
- As the muscles contract, the snail's foot creates waves of movement that push against the ground, allowing the snail to glide smoothly along surfaces.
Mucus Secretion
- To aid in movement, snails secrete a layer of mucus from glands located in their foot.
- This mucus serves several purposes:
- It reduces friction, making it easier for the snail to slide over various surfaces.
- It protects the snail’s body from sharp objects and rough terrain.
- It helps in moisture retention, preventing the snail from drying out.
Speed of Movement
- Snails are known for their slow pace, typically moving at a speed of about 0.03 miles per hour.
- This slow movement is due to their energy-efficient method of creeping, which conserves energy.
In conclusion, snails move by creeping, utilizing their muscular foot and mucus secretion to navigate their environment effectively. This method of movement is not only effective for them but also allows them to explore their surroundings without the risk of injury.
Snails are fascinating creatures known for their unique and slow method of movement. The correct answer to how a snail moves is option 'A', by creeping. Let's explore this in detail.
Body Structure
- Snails possess a soft, elongated body that is divided into two main parts: the foot and the visceral mass.
- The foot is a muscular structure located underneath the snail's body, which plays a crucial role in movement.
Movement Mechanism
- Snails use a process called "creeping" to move. This involves the contraction and relaxation of muscles in their foot.
- As the muscles contract, the snail's foot creates waves of movement that push against the ground, allowing the snail to glide smoothly along surfaces.
Mucus Secretion
- To aid in movement, snails secrete a layer of mucus from glands located in their foot.
- This mucus serves several purposes:
- It reduces friction, making it easier for the snail to slide over various surfaces.
- It protects the snail’s body from sharp objects and rough terrain.
- It helps in moisture retention, preventing the snail from drying out.
Speed of Movement
- Snails are known for their slow pace, typically moving at a speed of about 0.03 miles per hour.
- This slow movement is due to their energy-efficient method of creeping, which conserves energy.
In conclusion, snails move by creeping, utilizing their muscular foot and mucus secretion to navigate their environment effectively. This method of movement is not only effective for them but also allows them to explore their surroundings without the risk of injury.
What is the purpose of the skeleton in the human body?- a)To facilitate digestion
- b)To provide shape and structure
- c)To produce blood cells
- d)To regulate body temperature
Correct answer is option 'B'. Can you explain this answer?
a)
To facilitate digestion
b)
To provide shape and structure
c)
To produce blood cells
d)
To regulate body temperature
|
Harshad Goyal answered |
Purpose of the Skeleton in the Human Body
The skeleton plays a crucial role in the human body, serving multiple functions that are essential for overall health and well-being. Among the various functions, the primary purpose is to provide shape and structure.
1. Provides Shape and Structure
- The skeleton acts as a framework for the body, giving it a defined shape.
- It supports soft tissues and organs, helping to maintain their position and preventing sagging.
- The bones vary in size and shape, which contributes to the unique appearance of each individual.
2. Protection of Vital Organs
- Bones encase and protect vital organs, such as the brain, heart, and lungs.
- The skull protects the brain from injury, while the ribcage shields the heart and lungs.
3. Facilitates Movement
- The skeleton works with muscles to allow for movement.
- Joints, where two bones meet, enable flexibility and range of motion.
4. Produces Blood Cells
- While this function is not related to shape and structure, it's essential to note that bones produce blood cells in the bone marrow.
- This process is crucial for maintaining healthy blood circulation.
5. Stores Minerals
- Bones serve as a reservoir for essential minerals, such as calcium and phosphorus, which are vital for various bodily functions.
In conclusion, the skeleton primarily provides shape and structure to the human body, along with several other essential functions that contribute to overall health and mobility.
The skeleton plays a crucial role in the human body, serving multiple functions that are essential for overall health and well-being. Among the various functions, the primary purpose is to provide shape and structure.
1. Provides Shape and Structure
- The skeleton acts as a framework for the body, giving it a defined shape.
- It supports soft tissues and organs, helping to maintain their position and preventing sagging.
- The bones vary in size and shape, which contributes to the unique appearance of each individual.
2. Protection of Vital Organs
- Bones encase and protect vital organs, such as the brain, heart, and lungs.
- The skull protects the brain from injury, while the ribcage shields the heart and lungs.
3. Facilitates Movement
- The skeleton works with muscles to allow for movement.
- Joints, where two bones meet, enable flexibility and range of motion.
4. Produces Blood Cells
- While this function is not related to shape and structure, it's essential to note that bones produce blood cells in the bone marrow.
- This process is crucial for maintaining healthy blood circulation.
5. Stores Minerals
- Bones serve as a reservoir for essential minerals, such as calcium and phosphorus, which are vital for various bodily functions.
In conclusion, the skeleton primarily provides shape and structure to the human body, along with several other essential functions that contribute to overall health and mobility.
What is the outer skeleton of a cockroach made of?- a) Bones
- b) Chitin
- c) Cartilage
- d) Wood
Correct answer is option 'B'. Can you explain this answer?
What is the outer skeleton of a cockroach made of?
a)
Bones
b)
Chitin
c)
Cartilage
d)
Wood
|
Rohini Seth answered |
The outer skeleton of a cockroach is made of chitin. This hard exoskeleton is composed of plates joined together, providing protection and support for the cockroach's body. Chitin is a tough, lightweight material that permits movement in arthropods like cockroaches.
What is the primary function of joints in the human body?- a) To provide structural support
- b) To store excess energy
- c) To enable movement
- d) To produce blood cells
Correct answer is option 'C'. Can you explain this answer?
What is the primary function of joints in the human body?
a)
To provide structural support
b)
To store excess energy
c)
To enable movement
d)
To produce blood cells
|
|
Dr Manju Sen answered |
Joints in the human body primarily function to enable movement. These points of articulation between bones allow for flexibility and motion, facilitating various activities such as bending, rotating, and extending different body parts.
What is the purpose of cartilage in the human body?- a) To protect internal organs
- b) To provide structural support to bones
- c) To facilitate smooth movement at joints
- d) To aid in muscle contraction
Correct answer is option 'C'. Can you explain this answer?
What is the purpose of cartilage in the human body?
a)
To protect internal organs
b)
To provide structural support to bones
c)
To facilitate smooth movement at joints
d)
To aid in muscle contraction
|
|
Rahul Kumar answered |
Cartilage in the human body serves the purpose of facilitating smooth movement at joints. It is a flexible and resilient connective tissue that covers the surface of bones at joints, reducing friction and allowing for seamless motion. Cartilage plays a crucial role in ensuring joint flexibility and protecting bones from wear and tear during movement.
What is the structure in our body that encloses and protects some important internal parts, such as the heart and lungs?- a) Pelvic bones
- b) Skull
- c) Rib cage
- d) Shoulder bones
Correct answer is option 'C'. Can you explain this answer?
What is the structure in our body that encloses and protects some important internal parts, such as the heart and lungs?
a)
Pelvic bones
b)
Skull
c)
Rib cage
d)
Shoulder bones
|
Eduskill Classes answered |
The rib cage is the structure in our body that encloses and protects some vital internal organs such as the heart and lungs. It consists of 12 ribs on each side of the chest, joining the chest bone and the backbone together to form a protective box. This structure plays a crucial role in safeguarding internal organs and supporting the body's overall structure.
How many Ribs are there on each side of chest.- a)10
- b)12
- c)14
- d)16
Correct answer is option 'B'. Can you explain this answer?
How many Ribs are there on each side of chest.
a)
10
b)
12
c)
14
d)
16
|
|
Subset Academy answered |
There are 12 Ribs cages on each side of chest.
Topic in NCERT: Fixed Joints
Line in NCERT: "There are 12 ribs on each side of rib cage."
Which joint in the body allows only a back-and-forth movement, similar to the movement of a door on its hinges?- a)Ball and socket joint
- b)Pivotal joint
- c)Hinge joint
- d)Fixed joint
Correct answer is option 'C'. Can you explain this answer?
a)
Ball and socket joint
b)
Pivotal joint
c)
Hinge joint
d)
Fixed joint
|
|
Subset Academy answered |
A hinge joint, like the one at our elbow, permits movement in only one plane, allowing for a back-and-forth motion. This type of joint is akin to the movement observed when opening and closing a door on its hinges.
How does the streamlined shape of a fish help it move in water?- a) It helps in breathing
- b) It allows water flow around easily
- c) It attracts prey
- d) It provides camouflage
Correct answer is option 'B'. Can you explain this answer?
How does the streamlined shape of a fish help it move in water?
a)
It helps in breathing
b)
It allows water flow around easily
c)
It attracts prey
d)
It provides camouflage
|
Jyoti Kaur answered |
Importance of Streamlined Shape in Fish Movement
The streamlined shape of a fish is a crucial adaptation that enhances its ability to move efficiently through water. This design minimizes resistance and allows the fish to swim with ease. Here’s a detailed explanation:
Reduced Water Resistance
- The streamlined body of the fish reduces drag, which is the resistance encountered when moving through water.
- The pointed head and tapered tail enable water to flow smoothly around the fish, allowing it to cut through the water with minimal effort.
Efficient Swimming
- A streamlined shape means that fish can swim faster and with less energy expenditure. This efficiency is vital for escaping predators and catching prey.
- Fish can maintain speed and agility, enabling them to maneuver quickly to avoid obstacles or threats.
Hydrodynamic Properties
- The design allows fish to maintain stability and control while swimming, which is essential for navigating through various aquatic environments.
- The shape helps in creating lift, allowing fish to rise or dive in the water column effectively.
Conclusion
In summary, the streamlined shape of fish is primarily beneficial because it allows water to flow around them easily. This not only aids in reducing resistance but also enhances their swimming capabilities, making them agile and efficient swimmers in their aquatic habitat.
The streamlined shape of a fish is a crucial adaptation that enhances its ability to move efficiently through water. This design minimizes resistance and allows the fish to swim with ease. Here’s a detailed explanation:
Reduced Water Resistance
- The streamlined body of the fish reduces drag, which is the resistance encountered when moving through water.
- The pointed head and tapered tail enable water to flow smoothly around the fish, allowing it to cut through the water with minimal effort.
Efficient Swimming
- A streamlined shape means that fish can swim faster and with less energy expenditure. This efficiency is vital for escaping predators and catching prey.
- Fish can maintain speed and agility, enabling them to maneuver quickly to avoid obstacles or threats.
Hydrodynamic Properties
- The design allows fish to maintain stability and control while swimming, which is essential for navigating through various aquatic environments.
- The shape helps in creating lift, allowing fish to rise or dive in the water column effectively.
Conclusion
In summary, the streamlined shape of fish is primarily beneficial because it allows water to flow around them easily. This not only aids in reducing resistance but also enhances their swimming capabilities, making them agile and efficient swimmers in their aquatic habitat.
Which body part does a snake primarily use for moving from place to place?- a) Legs
- b) Whole body
- c) Wings
- d) Fins
Correct answer is option 'B'. Can you explain this answer?
Which body part does a snake primarily use for moving from place to place?
a)
Legs
b)
Whole body
c)
Wings
d)
Fins
|
EduRev Class 6 answered |
Snakes primarily use their whole body for moving from place to place. Their unique anatomy allows them to slither and crawl efficiently without the need for legs, enabling them to navigate various terrains and environments.
What is the purpose of the bristles found under an earthworm's body?- a) To help in flying
- b) To aid in swimming
- c) To grip the ground
- d) To attract mates
Correct answer is option 'C'. Can you explain this answer?
What is the purpose of the bristles found under an earthworm's body?
a)
To help in flying
b)
To aid in swimming
c)
To grip the ground
d)
To attract mates
|
|
Torcia Education answered |
The bristles under an earthworm's body serve the purpose of gripping the ground. These tiny hair-like structures connected to muscles help the earthworm get a good hold on the soil, enabling it to move effectively and navigate its environment.
How many vertebrae make up the backbone in the human body?- a) 12
- b) 33
- c) 24
- d) 42
Correct answer is option 'B'. Can you explain this answer?
How many vertebrae make up the backbone in the human body?
a)
12
b)
33
c)
24
d)
42
|
Jay Goyal answered |
Vertebrae in the Human Backbone
The human backbone, also known as the vertebral column or spine, is an essential structure composed of individual bones called vertebrae.
How Many Vertebrae Are There?
- The total number of vertebrae in the human body is 33.
Structure of the Vertebral Column
- The vertebral column is divided into five distinct regions:
- Cervical Region: 7 vertebrae (C1-C7)
- Thoracic Region: 12 vertebrae (T1-T12)
- Lumbar Region: 5 vertebrae (L1-L5)
- Sacral Region: 5 fused vertebrae (S1-S5) forming the sacrum
- Coccygeal Region: 4 fused vertebrae (Co1-Co4) forming the coccyx or tailbone
Why 33 Vertebrae?
- The vertebrae provide flexibility and support to the body. Each region has a specific function:
- Cervical: Supports the head and allows for movement.
- Thoracic: Protects the heart and lungs, attached to ribs.
- Lumbar: Supports the lower back and bears most of the body’s weight.
- Sacral and Coccygeal: Provide stability and support during sitting.
Conclusion
- In summary, the correct answer to the question is option B, as the human backbone is made up of 33 vertebrae in total, each contributing to the overall function and structure of the spine.
The human backbone, also known as the vertebral column or spine, is an essential structure composed of individual bones called vertebrae.
How Many Vertebrae Are There?
- The total number of vertebrae in the human body is 33.
Structure of the Vertebral Column
- The vertebral column is divided into five distinct regions:
- Cervical Region: 7 vertebrae (C1-C7)
- Thoracic Region: 12 vertebrae (T1-T12)
- Lumbar Region: 5 vertebrae (L1-L5)
- Sacral Region: 5 fused vertebrae (S1-S5) forming the sacrum
- Coccygeal Region: 4 fused vertebrae (Co1-Co4) forming the coccyx or tailbone
Why 33 Vertebrae?
- The vertebrae provide flexibility and support to the body. Each region has a specific function:
- Cervical: Supports the head and allows for movement.
- Thoracic: Protects the heart and lungs, attached to ribs.
- Lumbar: Supports the lower back and bears most of the body’s weight.
- Sacral and Coccygeal: Provide stability and support during sitting.
Conclusion
- In summary, the correct answer to the question is option B, as the human backbone is made up of 33 vertebrae in total, each contributing to the overall function and structure of the spine.
What type of joint is described as having one bone's rounded end fitting into the cavity of another bone, allowing movements in all directions?- a) Hinge joint
- b) Pivot joint
- c) Ball and socket joint
- d) Gliding joint
Correct answer is option 'C'. Can you explain this answer?
What type of joint is described as having one bone's rounded end fitting into the cavity of another bone, allowing movements in all directions?
a)
Hinge joint
b)
Pivot joint
c)
Ball and socket joint
d)
Gliding joint
|
|
Torcia Education answered |
A ball and socket joint, like the shoulder joint, allows for movements in all directions due to one bone's rounded end fitting into the cavity of another bone. This design enables a wide range of motion, making it one of the most flexible types of joints in the body.
The place where cartilage is present in our body is- a)outer parts of ear
- b)at the end of nose
- c)discs between vertebrae of the backbone
- d)all of the above
Correct answer is option 'D'. Can you explain this answer?
The place where cartilage is present in our body is
a)
outer parts of ear
b)
at the end of nose
c)
discs between vertebrae of the backbone
d)
all of the above
|
|
Dr Manju Sen answered |
Cartilage, a firm, flexible connective tissue, is found in various parts of our body. The correct answer to the question is:
- Cartilage is present in the outer parts of the ear, providing structure and shape.
- It is also located at the end of the nose, supporting and shaping the tip.
- Cartilage acts as a cushion and support between the vertebrae of the backbone, known as intervertebral discs.
Therefore, the correct answer is D: all of the above, as cartilage is indeed found in these locations.
- Cartilage is present in the outer parts of the ear, providing structure and shape.
- It is also located at the end of the nose, supporting and shaping the tip.
- Cartilage acts as a cushion and support between the vertebrae of the backbone, known as intervertebral discs.
Therefore, the correct answer is D: all of the above, as cartilage is indeed found in these locations.
Which type of joint is found between the upper jaw and the rest of the head, preventing movement?- a)Pivotal joint
- b)Ball and socket joint
- c)Hinge joint
- d)Fixed joint
Correct answer is option 'D'. Can you explain this answer?
a)
Pivotal joint
b)
Ball and socket joint
c)
Hinge joint
d)
Fixed joint
|
|
Shiksha Academy answered |
A fixed joint is present between the upper jaw and the rest of the head, restricting movement in this area. This type of joint is crucial for maintaining stability and support in certain parts of the body.
Which joint joins our neck with our head?- a)Ball and Socket joint
- b)Pivotal joint
- c)Hinge Joint
- d)Fixed Joint
Correct answer is option 'B'. Can you explain this answer?
Which joint joins our neck with our head?
a)
Ball and Socket joint
b)
Pivotal joint
c)
Hinge Joint
d)
Fixed Joint
|
Gunjan Lakhani answered |
The joint where our neck joins the head is a pivotal joint. It allows us to bend our head forward and backward and turn the head to our right or left.
Topic in NCERT: Pivotal Joint
Line in NCERT: "The joint where our neck joins the head is a pivotal joint "
Which of the following moves by contraction and expansion of the body?- a)Snake
- b)Earthworm
- c)Snail
- d)Crab
Correct answer is option 'B'. Can you explain this answer?
Which of the following moves by contraction and expansion of the body?
a)
Snake
b)
Earthworm
c)
Snail
d)
Crab
|
|
Shiksha Academy answered |
- Earthworm: Earthworms move by contracting and expanding their body segments. They have circular and longitudinal muscles.
The correct answer is C: Earthworm.
The correct answer is C: Earthworm.
Which part of the skeleton protects the brain?- a)Spine
- b)Rib cage
- c)Skull
- d)Pelvis
Correct answer is option 'C'. Can you explain this answer?
Which part of the skeleton protects the brain?
a)
Spine
b)
Rib cage
c)
Skull
d)
Pelvis
|
Get Idea answered |
The skull is a bony structure that serves to protect the brain from injury.
Key points:
- The skull is composed of multiple bones joined together.
- It encases and safeguards the brain, a vital organ.
Topic in NCERT: Fixed joints
Line in NCERT: "The skull is made up of many bones joined together. It encloses and protects a very important part of the body, the brain."
An earthworm moves by using its ____.- a)Bones
- b)Wings
- c)Muscles
- d)Brains
Correct answer is option 'C'. Can you explain this answer?
An earthworm moves by using its ____.
a)
Bones
b)
Wings
c)
Muscles
d)
Brains
|
|
Torcia Education answered |
Earthworms move by alternately extending and contracting their body using muscles. These muscles help the earthworm to crawl through the soil.
Which type of joint connects the upper arm to the shoulder?- a)Hinge joint
- b)Pivot joint
- c)Ball and socket joint
- d)Gliding joint
Correct answer is option 'C'. Can you explain this answer?
Which type of joint connects the upper arm to the shoulder?
a)
Hinge joint
b)
Pivot joint
c)
Ball and socket joint
d)
Gliding joint
|
|
Get Idea answered |
The shoulder features a ball and socket joint, which allows for movement in all directions. This joint enables the arm to rotate freely.
Topic in NCERT: Ball and socket joints
Line in NCERT: "The bowl is like the part of the shoulder to which your arm is joined."
What is the primary function of the fins on a fish's body?- a) To help in breathing
- b) To maintain body temperature
- c) To keep balance and direction
- d) To aid in camouflage
Correct answer is option 'C'. Can you explain this answer?
What is the primary function of the fins on a fish's body?
a)
To help in breathing
b)
To maintain body temperature
c)
To keep balance and direction
d)
To aid in camouflage
|
|
Eduskill Classes answered |
The fins on a fish's body primarily serve to maintain balance and direction while swimming. These fins help the fish stabilize itself and navigate through water effectively.
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