13. Intext question I

Exercise condition:

3 m.

What are trophic levels? Give an example of a food chain and state the different trophic levels in it.

a. The _____________ forms a trophic level. In an ecosystem, a trophic level comprises a group of organisms that occupy the same level in a food chain.

Level of the microorganisms
Level of the animals
Level of the food chain
Level of the algae

b. An example of a food chain is

Insects \(\rightarrow\) Grass \(\rightarrow\) Frog \(\rightarrow\) Eagle \(\rightarrow\) Snake
Grass \(\rightarrow\) Insects \(\rightarrow\) Frog \(\rightarrow\) Snake \(\rightarrow\) Eagle
Insects \(\rightarrow\) Frog \(\rightarrow\) Grass \(\rightarrow\) Eagle \(\rightarrow\) Snake
Insects \(\rightarrow\) Grass \(\rightarrow\) Frog \(\rightarrow\) Snake \(\rightarrow\) Eagle

c. In this food chain depicted, grass is the _________ that is eaten by the insect _______. Insect can be the food for frog which is a ________. The snake is the _________ which eats the frog. The eagle is the tertiary consumer which consumes snake.

Autotroph, primary consumer, secondary consumer, tertiary consumer
Heterotroph, tertiary consumer , secondary consumer, primary consumer
Autotroph, secondary consumer, primary consumer, tertiary consumer
Heterotroph, primary consumer, secondary consumer, tertiary consumer

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