List-I | List-II | ||
| (a) | Allen's Rule | (i) | Kangaroo rat |
| (b) | Physiological adaptation | (ii) | Desert lizard |
| (c) | Behavioral adaptation | (iii) | Marine fish at depth |
| (d) | Biochemical adaptation | (iv) | Polar seal |
(iv) (iii) (ii) (i)
(iv) (ii) (iii) (i)
(iv) (i) (iii) (ii)
(iv) (i) (ii) (iii)
The question involves matching concepts from ecology and biology with their correct adaptations or examples. Let's explore each option to understand the matches:
Based on these explanations, here's how the concepts match with their corresponding examples:
| List-I | List-II |
| (a) Allen's Rule | (iv) Polar Seal |
| (b) Physiological Adaptation | (i) Kangaroo Rat |
| (c) Behavioral Adaptation | (ii) Desert Lizard |
| (d) Biochemical Adaptation | (iii) Marine Fish at Depth |
Thus, the correct sequence for the matches is (iv) (i) (ii) (iii), which aligns with the given correct answer option.
These matchings are based on ecological and behavioral adaptations observed in nature, helping organisms survive in diverse and extreme habitats.

A sphere of radius R is cut from a larger solid sphere of radius 2R as shown in the figure. The ratio of the moment of inertia of the smaller sphere to that of the rest part of the sphere about the Y-axis is : 
AB is a part of an electrical circuit (see figure). The potential difference \(V_A - V_B\), at the instant when current \(i = 2\) A and is increasing at a rate of 1 amp/second is:
Population ecology is the study of these and other questions about what factors affect population and how and why a population changes over time. Population ecology has its deepest historic roots, and its richest development, in the study of population growth, regulation, and dynamics, or demography. Human population growth serves as an important model for population ecologists, and is one of the most important environmental issues of the twenty-first century. But all populations, from disease organisms to wild-harvested fish stocks and forest trees to the species in a successional series to laboratory fruit files and paramecia, have been the subject of basic and applied population biology.