Food Chain and Trophic Levels

Q.

Why are small intestines longer in herbivores as compared to carnivores?

Q.

Difference between saprophyte and heterotrophic

Q. Decomposers are also called

1. saprotrophs
2. phagotrophs
3. autotrophs

Q. Which of the following statements are correct with respect to food chains in an ecosystem?
I) Removal of 80% of tigers from an area will result in an increased growth of vegetation.
II) Removal of most of the carnivores will result in an increased population of deers.
III) The length of food chain is generally limited to 3 - 4 trophic levels in an ecosystem.
IV) Topmost trophic level possess the maximum energy.

1. I and IV
2. I and II
3. III and 1V
4. II and III

Q. Which part of a food chain will be affected if one animal goes extinct?

1. The whole food chain is affected.
2. Only animals at the top of the food chain are affected.
3. Only plants and animals at the bottom of the food chain are affected.
4. Only producers and decomposers are affected.

Q. Regarding assertion and reason, select the right option.

Statement [A]: A network of food chain existing together in an ecosystem is known as a food web.

Statement [B]: A bird like kite cannot be a part of a food web.

1. Both assertion and reason are true and the reason is the correct explanation of assertion
2. Both assertion and reason are true but reason is not the correct explanation of assertion
3. Assertion is true but reason is false
4. Assertion is false and reason is true

Q. In a food chain, form the first trophic level and form the last trophic level.

1. producers
2. consumers
3. decomposers
4. heterotrophs

Q. What is the trophic level of a bamboo plant growing in a far-off forest?

1. First trophic level $\left(T_1\right)$
2. Second trophic level $\left(T_2\right)$
3. Third trophic level $\left(T_3\right)$
4. Fourth trophic level $\left(T_4\right)$

Q. complete a food chain.

1. Producers
2. Decomposers
3. Consumers
4. Autotrophs

Q. Statement 1: In a food chain, number of organisms at each successive level decreases.
Statement 2: Number of organisms at any trophic level depends upon the availability of food and energy.

1. Both the statements are true and statement 2 is the correct explanation for statement 1
2. Statement 1 is not true but statement 2 is true
3. Statement 1 is true but statement 2 is false
4. Both the statements are false

Q.

Give an example of a food chain.

Q. Match the organisms with their respective mode of nutrition.

1. Autotrophic
2. Heterotrophic
3. Saprotrophic

Q. The top level of the food chain is occupied by carnivores.

1. False
2. True

Q. Which one of the following types of organisms occupy more than one trophic level in a pond ecosystem?

1. Fish
2. Phytoplankton
3. Zooplankton
4. Frog

Q. Based on the given assertion and reason, choose the right option.
Assertion [A]: Decomposers are excluded from the food chains.
Reason [R]: Decomposers act at all trophic levels of food chains.

1. Both the A and R are true and R explains A
2. Both A and R are true and R does not explain A
3. A is true and R is false
4. Both A and R are false

Q. A food chain is made up of ____.

1. biotic components
2. abiotic components
3. habitats
4. ecosystems