All questions of Our Body: Teeth for Grade 2 Exam

B is correct answer

C is the correct answer

We take meal three times in a day so in meal whatever we eat it stuck in our mouth to remove that from our mouth we should brush our teeth three times in a day

Our body has Many different parts.

Explanation:
Our body is a complex structure made up of various organs, tissues, and cells that work together to perform different functions. These parts can be categorized into different systems, each with its own specific role. Here are some of the key parts of our body:

- Skeletal System:
The skeletal system consists of bones, which provide support and structure to the body. It also protects internal organs and helps with movement.

- Muscular System:
The muscular system is responsible for movement. It includes muscles that work together to allow us to walk, talk, and perform various activities.

- Circulatory System:
The circulatory system includes the heart, blood vessels, and blood. It transports oxygen, nutrients, hormones, and waste products throughout the body.

- Respiratory System:
The respiratory system includes the lungs, trachea, and bronchial tubes. It is responsible for the exchange of oxygen and carbon dioxide in the body.

- Digestive System:
The digestive system processes food and absorbs nutrients. It includes organs such as the stomach, intestines, liver, and pancreas.

- Nervous System:
The nervous system controls and coordinates the activities of the body. It includes the brain, spinal cord, and nerves.

- Endocrine System:
The endocrine system produces hormones that regulate various bodily functions. It includes glands such as the pituitary gland, thyroid gland, and adrenal glands.

- Reproductive System:
The reproductive system is responsible for the production of offspring. It includes organs such as the uterus, ovaries, testes, and penis.

- Urinary System:
The urinary system filters waste products from the blood and removes them from the body. It includes the kidneys, ureters, bladder, and urethra.

- Integumentary System:
The integumentary system is the body's outer covering, including the skin, hair, and nails. It protects the body from external factors and helps regulate body temperature.

- Lymphatic System:
The lymphatic system helps fight against infections and diseases. It includes lymph nodes, lymph vessels, and lymph fluid.

- Sensory Organs:
These include the eyes, ears, nose, tongue, and skin, which help us perceive and interpret the world around us.

These are just a few examples of the many different parts of our body. Each part has its own unique function and contributes to the overall functioning of the body as a whole.

Explanation:

Introduction:
The question states that the person is studying in class. We need to identify the correct option that represents the number of the class the person is studying in.

Understanding the options:
Let's analyze each option to understand the numbers they represent:

a) II two: This option represents the number two in Roman numerals.
b) IV four: This option represents the number four in Roman numerals.
c) III three: This option represents the number three in Roman numerals.
d) I one: This option represents the number one in Roman numerals.

Identifying the correct answer:
Since the person is studying in a class, it is logical to assume that the class number would be represented by a cardinal number rather than a Roman numeral. Roman numerals are commonly used for representing centuries, book chapters, or other specialized purposes, but not for representing class numbers.

Therefore, the correct answer is option 'd' - I one, as it represents the number one in cardinal numbers. This implies that the person is studying in class one.

Conclusion:
By analyzing the options and understanding the context of the question, we can conclude that the correct answer is option 'd' - I one, as it represents the number one in cardinal numbers, indicating that the person is studying in class one.

The body part used to write is the Hand.

Explanation:
Writing is a skill that requires the use of various parts of the body, such as the eyes to see, the mouth to speak, and the feet to move around. However, the primary body part used to write is the hand. Here are some reasons why the hand is used to write:

1. Fine motor skills: Writing requires the use of fine motor skills, which are the small movements of the hand and fingers. These skills are essential for holding a pencil or pen and making precise movements to form letters and words.

2. Hand-eye coordination: Writing also requires hand-eye coordination, which is the ability to use the eyes to guide the movements of the hand. This coordination is necessary for writing neatly and accurately.

3. Brain-hand connection: Writing involves a connection between the brain and the hand. The brain sends signals to the hand, telling it what to write, and the hand responds by forming the letters and words.

4. Writing speed: Finally, the hand is used to write because it is the fastest body part for writing. While some people can type faster than they can write, handwriting is still a valuable skill that is used in many situations.

In conclusion, the hand is the primary body part used for writing because it requires fine motor skills, hand-eye coordination, a brain-hand connection, and is the fastest method of writing.

Ytut

**Explanation:**

The correct answer to the question is option 'C' - Black.

**Eye Color Variations:**
The color of a person's eyes is determined by the pigmentation of the iris, which is the colored part of the eye. The iris contains a pigment called melanin, which is responsible for eye color. The amount and distribution of melanin in the iris determine the color of the eyes.

**Variations in Eye Color:**
1. **Blue Eyes:** People with blue eyes have low levels of melanin in their irises. The blue color is a result of light scattering and reflecting off the iris.
2. **Green/Hazel Eyes:** People with green or hazel eyes have a moderate amount of melanin in their irises. The combination of blue and green pigments in the iris results in these eye colors.
3. **Brown Eyes:** People with brown eyes have a higher concentration of melanin in their irises. The brown color is due to the abundant melanin pigments.
4. **Gray Eyes:** Gray eyes have a lower amount of melanin in the irises, giving them a grayish appearance.
5. **Amber Eyes:** Amber eyes have a unique golden or yellowish color due to the presence of a yellow pigment called lipochrome.

**Black Eyes:**
While black is not a common eye color, it is possible for some individuals to have extremely dark brown eyes that appear black. This is primarily due to the high concentration of melanin in their irises. The abundance of melanin pigments absorbs most of the light, making the eyes appear very dark.

**Conclusion:**
In conclusion, the correct answer to the question regarding the color of the eyes is option 'C' - Black. This answer is based on the understanding that black eyes can occur when there is a high concentration of melanin in the irises, resulting in a very dark appearance.

The name of the school is Delhi Public School.

Explanation:
Delhi Public School is a popular chain of schools in India that has over 200 branches across the country. Each branch of the school has a unique name that typically includes the city or region where it is located. So, while options a, c, and d may be valid school names, the correct answer to this question is option b which specifically mentions Delhi Public School.

Some key facts about Delhi Public School:

- Delhi Public School was founded in 1949 by a group of Indian educationists led by educationist and parliamentarian Shri. K. K. Birla.

- The school is known for its academic excellence and has consistently been ranked among the top schools in India.

- Delhi Public School offers education from nursery to class 12 and follows the CBSE curriculum.

- The school has a strong focus on extracurricular activities and offers a range of sports, arts, and cultural activities for students to participate in.

- Delhi Public School has a strong alumni network, with many of its former students going on to achieve success in fields such as business, politics, and entertainment.

Explanation:

The correct answer is option 'A', which means we carry our school bag on our shoulder. Let's understand why this is the correct answer.

Reasoning:

Carrying a school bag on the shoulder is the most common and practical way for students. Here are a few reasons to support this answer:

1. Comfort: Carrying a school bag on the shoulder is comfortable for students. The weight of the bag is distributed evenly across the shoulder, making it easier to carry.

2. Balance: When a student carries a school bag on their shoulder, it helps maintain their balance while walking or moving around. The bag stays close to the body and does not hinder their movement.

3. Accessibility: Carrying a bag on the shoulder allows students to access their belongings easily. They can quickly reach into their bag to take out books, notebooks, or other items without much effort.

4. Safety: Carrying a bag on the shoulder ensures that the bag does not obstruct the student's vision. It leaves their hands free to hold handrails or grab onto something for support, reducing the risk of accidents.

5. Posture: Carrying a bag on the shoulder promotes good posture. Students can adjust the strap length to ensure the bag is positioned correctly on their back, preventing strain or discomfort.

Conclusion:

In conclusion, carrying a school bag on the shoulder is the most suitable and practical option for students. It provides comfort, balance, accessibility, safety, and promotes good posture. Therefore, option 'A' is the correct answer.

Explanation:

The correct answer to the question "Where do you live?" is option 'C', which is Delhi.

Reasoning:

The question is asking about the place where the person lives. So, the correct answer would be the place where the person currently resides.

The options given are Mumbai, Lucknow, Delhi, and Sitapur. Out of these options, only Delhi is the correct answer as it is a place where someone might live.

Option 'A' Mumbai, option 'B' Lucknow, and option 'D' Sitapur are also places where people live, but they are not the correct answer to the question asked. Therefore, the correct answer is option 'C' Delhi.

The colour of your hair is black

Hair color is determined by the presence of pigment called melanin, which is produced by specialized cells called melanocytes. The amount and type of melanin present in the hair follicles determine the hair color.

Factors determining hair color

There are several factors that contribute to the natural hair color of an individual, including:

1. Genetics: The most important factor influencing hair color is genetics. Genes inherited from parents play a major role in determining the color of an individual's hair. The genes involved in hair color production are complex and can be influenced by multiple genetic factors.

2. Melanin: Melanin is the pigment responsible for producing hair color. It is produced by melanocytes, which are specialized cells located at the base of the hair follicles. There are two types of melanin: eumelanin, which produces brown to black hair color, and pheomelanin, which produces red to blonde hair color.

Black hair color

Black hair color is the darkest shade of hair color. It is characterized by a high concentration of eumelanin, which produces a dark brown to black color. People with black hair color typically have a higher amount of eumelanin and a lower amount of pheomelanin.

Other hair color options

While the correct answer for the given question is option 'A' (black), it is important to note that hair color can vary widely among individuals. Some other common hair colors include:

- Green: Green hair color is not a natural hair color. It can be achieved through hair dye or temporary hair color products.

- Yellow: Yellow hair color is also not a natural hair color. It can occur due to bleaching or lightening of the hair.

- Red: Red hair color is caused by a higher concentration of pheomelanin and a lower concentration of eumelanin. It can range from strawberry blonde to deep red shades.

Conclusion

In conclusion, the color of an individual's hair is mainly determined by genetics and the amount and type of melanin present in the hair follicles. The correct answer for the given question is option 'A' (black), which represents the darkest shade of hair color. However, it is important to note that hair color can vary widely among individuals and can be influenced by various factors.