Trophic Levels

Q. The dead remains of plants and animals are the major source of energy for autotrophs.

1. Tertiary consumers
2. Herbivores

Q.

Read the Statements given below and answer the question(s) that follow:

The nutrients enable living organisms to build their bodies, to grow, to repair damaged parts of their bodies and provide the energy to carry out life processes. Nutrition is the mode of taking food by an organism and its utilisation by the body. The mode of nutrition in which organisms make food themselves from simple substances is called autotrophic nutrition. Therefore, plants are called autotrophs. Animals and most other organisms take in food prepared by plants. They are called heterotrophs.

The leaves of green plants have a green pigment called chlorophyll. It helps leaves to capture the energy of the sunlight. This energy is used to synthesise food from carbon dioxide and water. Since the synthesis of food occurs in the presence of sunlight, it is called photosynthesis. So, we find that chlorophyll, sunlight, carbon dioxide and water are necessary to carry out the process of photosynthesis. It is a unique process on the earth. The solar energy is captured by the leaves and stored in the plant in the form of food. Thus, sun is the ultimate source of energy for all living organisms.

“Sun is the ultimate source of energy for all living organisms” because:

1. Sun provides the necessary gravitational pull required for the plants to grow
2. Sun provides energy for the movement to all animals
3. Sun provides energy for the movement to earth
4. Plants get the energy to produce food from the sun, that is consumed by animals

Q. Plants make their own food using carbon dioxide and water in the presence of sunlight.

1. False
2. True

Q. Micro-organisms that obtain energy from the chemical breakdown of dead organisms are called _______.

1. omnivores
2. carnivores
3. herbivores
4. decomposers

Q.

What kinds of organisms are first-level consumers?

Q.

How do fungi help in recycling of dead organic materials in nature?

Q. ____________ is defined as a community of lifeforms in concurrence with non-living components, interacting with each other.

1. Biosphere
2. Environment
3. Ecotone
4. Ecosystem.

Q. The plants eventually die when kept in a dark room. This shows the importance of ______.

1. sunlight
2. water
3. air
4. food

Q. Assertion :In an ecosystem, the function of producers is to convert organic compounds into inorganic compounds. Reason: Green plants, convert light energy into chemical energy.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Assertion is incorrect but Reason is correct

Q. Which of the following animal is a herbivore?

1. Tiger
2. Cat
3. Buffalo
4. Crow

Q. ____________ is defined as a community of lifeforms in concurrence with non-living components, interacting with each other.

1. Biosphere
2. Environment
3. Ecotone
4. Ecosystem.

Q.

Example of ________ is a cow.

Q. The plants eventually die when kept in a dark room. This shows the importance of ______.

1. sunlight
2. food
3. water
4. air

Q.

Soil is said to be teeming with life because _________________.

1. soil contains micro-organisms

2. soil is made from rocks

3. soil harbors animals such as worms

4. None of the above

Q. Fungi and bacteria are detritus feeders, also known as

1. Omnivores
2. Deteritivores
3. Autotrophs
4. Herbivores

Q. Match Column I with Column II-Column II

Q. Fungi is an example of a _____.

1. producer
2. consumer
3. carnivore
4. decomposer

Q. Study the given food web and select the correct option regarding P, Q, R, S and T.

Q. Which of the following organism is a herbivore?

1. Cow
2. Lion
3. Tiger
4. Snake