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Class 6 Exam  >  Class 6 Tests  >  Olympiad Test: Living Organisms And Their Surroundings -1 - Class 6 MCQ

Olympiad Test: Living Organisms And Their Surroundings -1 - Class 6 MCQ


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20 Questions MCQ Test - Olympiad Test: Living Organisms And Their Surroundings -1

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Olympiad Test: Living Organisms And Their Surroundings -1 - Question 1
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Which among these children made a correct statement?

Detailed Solution for Olympiad Test: Living Organisms And Their Surroundings -1 - Question 1
Correct Statement:
- Saumya: Global warming increases the concentration of carbon dioxide in the atmosphere
Explanation:
- Global warming refers to the increase in Earth's average surface temperature due to human activities like burning fossil fuels.
- The burning of fossil fuels releases carbon dioxide (CO2) into the atmosphere.
- Carbon dioxide is a greenhouse gas that traps heat in the Earth's atmosphere, leading to the greenhouse effect and global warming.
- As global warming continues, the concentration of carbon dioxide in the atmosphere increases.
Incorrect Statements:
- Sumit: Global warming increases the concentration of nitrogen in the atmosphere
- Sanchit: Global warming increases the concentration of oxygen in the atmosphere
- Ashi: Global warming increases the concentration of ozone in the atmosphere
Explanation:
- Nitrogen (N2) and oxygen (O2) are the two most abundant gases in the Earth's atmosphere, and their concentrations remain relatively stable.
- Global warming does not directly increase the concentration of nitrogen or oxygen in the atmosphere.
- Ozone (O3) is a gas that plays a crucial role in the Earth's ozone layer, which protects us from harmful ultraviolet (UV) radiation.
- While global warming can indirectly influence the ozone layer, it does not directly increase the concentration of ozone in the atmosphere.
Therefore, Saumya made the correct statement that global warming increases the concentration of carbon dioxide in the atmosphere.
Olympiad Test: Living Organisms And Their Surroundings -1 - Question 2
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Which of the following characteristics of a glass of water mean that it cannot be considered alive?

Detailed Solution for Olympiad Test: Living Organisms And Their Surroundings -1 - Question 2

Characteristics of a glass of water that mean it cannot be considered alive:


- It has no heart: A glass of water does not possess a heart, which is a vital organ found in living organisms responsible for pumping blood and distributing oxygen. Without a heart, the glass of water cannot fulfill this essential function.
- It has no arms or legs: Arms and legs are appendages typically found in living organisms, enabling them to move and perform various activities. As a glass of water lacks these appendages, it is unable to exhibit mobility or engage in any form of physical movement.
- It has no cells: Cells are the basic building blocks of life, present in all living organisms. They carry out essential functions and processes necessary for life, such as growth, reproduction, and metabolism. As a glass of water lacks cells, it cannot perform these vital functions.
- It has no tissues: Tissues are comprised of specialized cells that work together to perform specific functions in organisms. Tissues contribute to the structural organization and functioning of living organisms. As a glass of water lacks tissues, it lacks the necessary structural organization and coordination seen in living organisms.
In conclusion, a glass of water cannot be considered alive due to its lack of a heart, arms or legs, cells, and tissues. These characteristics are fundamental to the definition of life and are absent in non-living entities like a glass of water.
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Olympiad Test: Living Organisms And Their Surroundings -1 - Question 3
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Some yeast, sugar and water are mixed in a test-tube. The diagrams show the testtube at the start and after one hour.

Q. Which process causes this change?

Olympiad Test: Living Organisms And Their Surroundings -1 - Question 4
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Excretion, irritability and reproduction are characteristics of:
Detailed Solution for Olympiad Test: Living Organisms And Their Surroundings -1 - Question 4

Plants and animals have all the following characteristics: excretion, irritability and reproduction. Let's talk firstly about the plants.
Plants can excrete through stomatal pores in the leaves. The main metabolic reactions that occur in a plant that produces these residues are cellular respiration and photosynthesis.  However, this place isn't the only that works as a way of excretion. Plants also excrete solid or slimy things. Talking about irritability, plants can have a reaction about all kind of stimulus, as chemical as phisical. For instance, the lights, the weather, animals around it, temperature and chemical changes inside the plants. About reproduction, plants can reproduce inside the gyno, the female sexual organ of plants. The gynoecium consists of the ovary, which produces and stores the eggs. In the eggs there are also the sex cells of the plant. Now talking about the animals, they have all sort of process, but is more complex than plants. You have about nine phylus in Animal Kingdom, and all sort of phylus has your unique excretion, irritability and reproduction.

Olympiad Test: Living Organisms And Their Surroundings -1 - Question 5
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Look at the following picture carefully. Which of the following characteristic of living organisms it is showing?
Olympiad Test: Living Organisms And Their Surroundings -1 - Question 6
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One of the characteristics of living organisms is that they all respire by:
Detailed Solution for Olympiad Test: Living Organisms And Their Surroundings -1 - Question 6
Characteristics of living organisms:
- Living organisms possess certain characteristics that distinguish them from non-living things.
- One such characteristic is the ability to respire, which is essential for obtaining energy.
- Respiration refers to the process by which organisms obtain energy from organic molecules.
Options:
A: Obtaining oxygen by breathing
- Breathing is the process of inhaling oxygen and exhaling carbon dioxide.
- While many organisms do obtain oxygen through respiration, it is not the only way.
B: Obtaining energy from sunlight
- This process is known as photosynthesis and is only carried out by plants and some other organisms.
- Photosynthesis converts sunlight into energy-rich molecules such as glucose.
C: Obtaining energy by chemically breaking down food
- This is the correct answer.
- Organisms obtain energy by breaking down organic molecules, such as carbohydrates, through a series of chemical reactions.
- This process is known as cellular respiration and occurs in the presence of oxygen (aerobic respiration) or without oxygen (anaerobic respiration).
D: Breaking down large molecules to smaller molecules by digestion
- Digestion is the process of breaking down food into smaller molecules that can be absorbed by the body.
- While digestion is an important part of obtaining nutrients, it is not the same as respiration.
Conclusion:
- The correct answer is C: Obtaining energy by chemically breaking down food.
- Respiration involves the chemical breakdown of organic molecules to obtain energy, and it is a characteristic shared by all living organisms.
Olympiad Test: Living Organisms And Their Surroundings -1 - Question 7
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The following picture is an example of plants. The picture is of ___________

.
Olympiad Test: Living Organisms And Their Surroundings -1 - Question 8
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Which of the following organisms is not ultimately dependent on the sun as a source of energy?
Detailed Solution for Olympiad Test: Living Organisms And Their Surroundings -1 - Question 8

Organisms dependent on the sun as a source of energy:
- Night-blooming flower: It relies on the sun for photosynthesis, which provides energy for its growth and development.
- Cave fish: Although it lives in a dark cave, it indirectly depends on the sun. This is because the debris it feeds on is derived from organic matter that is ultimately produced by photosynthesis in the surface ecosystem.
Organism not ultimately dependent on the sun:
- Underground earthworm: Earthworms obtain their energy from decomposing organic matter in the soil. They do not rely on the sun directly for energy.
Conclusion:
All organisms mentioned in the options indirectly depend on the sun for their energy needs except for the underground earthworm. The earthworm obtains its energy from the decomposition of organic matter, which is not directly linked to the sun. Therefore, the correct answer is option D: No, all the organisms are not ultimately dependent on the sun.
Olympiad Test: Living Organisms And Their Surroundings -1 - Question 9
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What is the term which refers to all the chemical energy transformations that occur within a cell?
Detailed Solution for Olympiad Test: Living Organisms And Their Surroundings -1 - Question 9

Metabolism is the set of life-sustaining chemical processes that enable organisms to transform the chemical energy stored in molecules into energy that can be used for cellular processes.
So, the correct option is 'metabolism'

Olympiad Test: Living Organisms And Their Surroundings -1 - Question 10
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Soham set up two small aquariums at home. He placed three rainbow fish in each aquarium but he put hydrilla plants in aquarium A only. After some time he observed that that the fish swam freely in aquarium A but the fish in aquarium B swam near the water surface.

Q. He concluded that the hydrilla plants_____________.
Olympiad Test: Living Organisms And Their Surroundings -1 - Question 11
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Study the diagram as shown below.

Q. Which one of the following is an example of Y?
Olympiad Test: Living Organisms And Their Surroundings -1 - Question 12
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Study the diagram below:

Q. Which group of items can you put into box A and B ?
Detailed Solution for Olympiad Test: Living Organisms And Their Surroundings -1 - Question 12

- The question asks which items can be placed into boxes A and B , things should be categories of non living things 
- Option C is the correct answer: "Man-made things and natural things."

 

Olympiad Test: Living Organisms And Their Surroundings -1 - Question 13
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John set up two tanks. He placed three guppies in each tank but he put hydrilla plants in Tank A only. John found that the fish swam freely in Tank A but the fish in Tank B swam near the water surface.

Q. At night, both the guppies and the hydrilla plants take in and give out .
Olympiad Test: Living Organisms And Their Surroundings -1 - Question 14
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Some green beans were placed on some damp cotton wool in a dish and placed in a dark corner. A few days later, the beans started to grow into seedlings. The beans get their food for growth from the ________________.
Detailed Solution for Olympiad Test: Living Organisms And Their Surroundings -1 - Question 14
Answer:
The green beans get their food for growth from the seed-leaves. Here is a detailed explanation:
1. Seed-leaves:
- Seed-leaves, also known as cotyledons, are the first leaves that emerge from a seed during germination.
- They are present in the embryo of the seed and contain stored food reserves.
- During germination, these stored food reserves are broken down and utilized by the seedling for growth and development.
- The food reserves in the seed-leaves provide essential nutrients such as carbohydrates, proteins, and fats, which are necessary for the seedling's growth.
2. Air:
- While air is essential for plant growth as it provides carbon dioxide for photosynthesis, in this scenario, the green beans are placed in a dark corner.
- Without light, photosynthesis cannot occur, and therefore, the seedlings cannot derive their food from the air.
3. Cotton wool:
- Cotton wool is only a medium used to provide moisture to the seeds.
- It does not provide any nutrients or food for the seedlings.
- The cotton wool helps to keep the seeds damp, creating a favorable environment for germination.
4. Water used to damp the cotton wool:
- Water is important for seed germination as it initiates the process by softening the seed coat.
- However, water alone does not provide the necessary nutrients for the seedlings.
- The seedlings require specific nutrients from the stored food reserves in their seed-leaves for growth.
In conclusion, the green beans obtain their food for growth from the seed-leaves. The stored food reserves in the seed-leaves provide the necessary nutrients for the seedlings' growth and development.
Olympiad Test: Living Organisms And Their Surroundings -1 - Question 15
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Which of the following describes respiration?
Ananya: Animals take in carbon dioxide and give off oxygen.
Sanchit: Animals take in oxygen and give off carbon dioxide.
Saumya: Plants take in carbon dioxide and give off oxygen.
Ranchit: Plants take in oxygen and give off carbon dioxide.
Detailed Solution for Olympiad Test: Living Organisms And Their Surroundings -1 - Question 15

Respiration is the process by which organisms exchange gases with the environment. Let's analyze each statement to determine which one accurately describes respiration:
- Ananya: Animals take in carbon dioxide and give off oxygen. This statement is incorrect as animals take in oxygen and give off carbon dioxide during respiration.
- Sanchit: Animals take in oxygen and give off carbon dioxide. This statement is correct as animals take in oxygen and release carbon dioxide as a waste product during respiration.
- Saumya: Plants take in carbon dioxide and give off oxygen. This statement is correct as plants take in carbon dioxide during respiration and release oxygen as a byproduct.
- Ranchit: Plants take in oxygen and give off carbon dioxide. This statement is incorrect as plants take in carbon dioxide and release oxygen during respiration.
Therefore, the statement that accurately describes respiration is:
- Sanchit and Saumya: Animals take in oxygen and give off carbon dioxide, while plants take in carbon dioxide and give off oxygen.
Hence, the correct answer is option B: Sanchit and Saumya.
Olympiad Test: Living Organisms And Their Surroundings -1 - Question 16
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Animals have structural and behavioural adaptations which enable them to survive in their natural habitats.


Q. By looking at the picture of the head of the fish, which of the following is true of how this organism survives in its natural habitat?
Olympiad Test: Living Organisms And Their Surroundings -1 - Question 17
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The following aquatic animals are grouped according to their breathing adaptations. Which group of animals does not breathe in the same way?
Detailed Solution for Olympiad Test: Living Organisms And Their Surroundings -1 - Question 17
Explanation:
The question asks to identify the group of animals that does not breathe in the same way. Let's examine each group of animals and their breathing adaptations:
A: Water stick insect and water scorpion
- Both are aquatic insects that breathe through spiracles, small openings on their bodies that allow air to enter.
B: Tubifex worm and tadpole
- Tubifex worms are small segmented worms that live in water and obtain oxygen through their skin.
- Tadpoles are the larval stage of frogs and breathe through gills.
C: Crab and wood louse
- Both are crustaceans that have gills for breathing, which extract oxygen from water.
D: Water spider and great diving beetle
- Water spiders create a diving bell or air bubble that they carry with them underwater, enabling them to breathe.
- Great diving beetles also have a similar adaptation, where they store air under their wing covers to breathe underwater.
Therefore, the group of animals that does not breathe in the same way is B: Tubifex worm and tadpole. Tubifex worms breathe through their skin, while tadpoles breathe through gills.
Olympiad Test: Living Organisms And Their Surroundings -1 - Question 18
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Which of the following animals have the correct form of adaptation?
Detailed Solution for Olympiad Test: Living Organisms And Their Surroundings -1 - Question 18
Explanation:
The correct form of adaptation among the given animals is option B: Whale with blow holes in its head. Here's the detailed explanation:
- Camel: bristles on his feet
- Camels have adaptations that help them survive in desert environments, such as:
- Humps to store fat reserves for energy.
- Thick fur to protect against the harsh sun.
- Long eyelashes to keep out sand.
- However, bristles on its feet are not a recognized adaptation of camels.
- Whale: blow holes in its head
- Whales have blowholes on the top of their heads, which are used for breathing.
- They can quickly inhale and exhale air without having to expose their entire body.
- This adaptation allows them to stay partially submerged in water while still breathing.
- Mudskipper: lungs for breathing
- Mudskippers are unique fish that have adaptations to live in intertidal zones, where they experience both land and water environments.
- They have specialized gills that allow them to extract oxygen from the air when out of water.
- However, lungs for breathing are not a recognized adaptation of mudskippers.
- Birds: compact bones
- Birds have hollow and lightweight bones that provide strength and reduce weight for flight.
- Their bones are filled with air sacs, making them more efficient for flying.
- The adaptation of compact bones helps birds to be lightweight and agile in the air.
Therefore, the correct answer is option B: Whale with blow holes in its head.
Olympiad Test: Living Organisms And Their Surroundings -1 - Question 19
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Animals use different parts of their bodies to move around.
In the following table, the body parts used by the corresponding animals are matched. Which animal is matched incorrectly?
Olympiad Test: Living Organisms And Their Surroundings -1 - Question 20
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Based on the diagrams of the dolphin and the fish (not drawn to scale), which characteristic they share in common?


1. They both have whiskers.
2. Each has a tail to propel itself forward in the water.
3. Both have gills to breath.
4. Both are warm blooded.
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