Question

Match List-I with List-II

List-I (Physiological changes)	List-II (Correct statement)
(A) Estivation	(I) Physiological changes with fluctuation in several environmental parameters
(B) Adaptation	(II) Physiological changes with fluctuation in single environmental variable
(C) Acclimation	(III) Innate characteristics that allow animal to survive in adverse environment
(D) Acclimatization	(IV) Seasonal abandonment of homeothermy

Choose the correct answer from the options given below

• (A) - (IV), (B) - (III), (C) - (II), (D) - (I)
• (A) - (I), (B) - (II), (C) - (III), (D) - (IV)
• (A) - (IV), (B) - (III), (C) - (I), (D) - (II)
• (A) - (III), (B) - (IV), (C) - (I), (D) - (II)

Hint:

An easy way to distinguish the two "A-climatization" terms:
- Acclimation = Response to a single artificial factor (controlled lab).
- Acclimatization = Response to multiple natural seasonal factors (complex nature).

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
To solve this, we must define and distinguish between the various physiological, behavioral, and evolutionary mechanisms that animals use to survive in changing or extreme environmental conditions.

Step 2: Detailed Explanation:
Let us analyze and pair each physiological term with its correct definition:

(A). Estivation: This is a state of dormancy and reduced metabolic rate practiced by some animals during hot and dry periods.
It represents a seasonal abandonment of homeothermy to conserve energy and water under high-temperature stress. Thus, (A) matches with (IV).

(B). Adaptation: These are genetically determined, innate physical, biochemical, or behavioral traits that have evolved over generations, allowing a species to survive and reproduce in a specific adverse environment. Thus, (B) matches with (III).

(C). Acclimation: This refers to coordinated, adaptive physiological changes that occur in an individual animal in response to a change in asingle, specific environmental variable (such as temperature or humidity) under controlled laboratory or chamber conditions. Thus, (C) matches with (II).

(D). Acclimatization: This refers to coordinated, adaptive physiological changes that occur in an individual animal in response to seasonal changes inmultiple complex environmental parameters (such as temperature, wind, and photoperiod) under natural field conditions. Thus, (D) matches with (I).
Combining these matches, we obtain: (A) - (IV), (B) - (III), (C) - (II), (D) - (I).

Step 3: Final Answer:
The correct option is (A).