Question 1

In a food chain, green plants are called ______ because they make their own food:

Accepted Answer

producers. Green plants are producers (autotrophs) and form the base of every food chain.

Question 2

Animals that eat only plants (herbivores) occupy the level of ______ in a food chain:

Accepted Answer

primary consumers. Herbivores feed directly on producers, so they are primary consumers.

Question 3

The flow of energy in a food chain is:

Accepted Answer

unidirectional (one-way). Energy flows one way — from the Sun to producers to consumers — and is lost as heat at each level.

Question 4

According to the ten-percent law, the energy passed on to the next trophic level is about:

Accepted Answer

10% of the energy at the previous level. Only about 10% of the energy at one level is transferred to the next; the rest is used up or lost as heat.

Question 5

Organisms such as bacteria and fungi that break down dead matter are called:

Accepted Answer

decomposers. Decomposers break down dead organisms, returning nutrients to the environment.

Question 6

A network of many interconnected food chains in an ecosystem is called a:

Accepted Answer

food web. A food web is formed by the interlinking of several food chains.

Food Chains & Energy Flow — Homi Bhabha Exam Biology MCQs with Solutions

Questions with solutions