Question

The following figure is a diagramatic representation of response of organisms to abiotic factors. Based on the graph, choose the correct statement:
i. Label A represents all birds and mammals.
ii. Label C represents 99 percentage of animals.
iii. Label B represents organisms that suspend their activities during unfavourable condition.

• A. (i), (ii) and (iii)
• B. (i) only
• C. (i) and (iii)
• D. (ii) and (iii)

Answer 1

The correct option is C (i) and (iii)

Based on how the organisms responds to the abiotic factors, they are categorised as conformers, regulators and partial regulators.

In the given graph, the labels (A,B,C) represents regulators, conformers and partial regulators respectively.

Regulators are organisms that are capable of maintaining homeostasis. For example, all birds and mammals are regulators. Thus the given statement (i) is correct.

Conformers are organisms that are not capable of maintaining homeostasis and opt for various other methods for survival. Suspending their activites during unfavourable conditions or migration to a place that favours their survival are some of the methods opted by the conformers to survive.
Ninety-nine percentage of animals are conformers. But in the graph label C represents partial regulators. Therefore statement (ii) is incorrect.
Organisms like the bacteria, fungi, are example of conformers that suspend their activities during unfavourable conditions. Thus, statement (iii) is correct.