Question

Mark the correct set.

Column I	Column II
I. Slow evolution	A. Non-progressive
II. Environment is responsible for evolution	B. Aristotle
III. Homologous organ	C. Bird wing and butterfly wing
IV. Analogous organ	D. Wing of bird and hose limb

• A. I- A, II- B, III- D, IV- C
• B. I- B, II- A, III- D, IV- C
• C. I- B, II- A, III- C, IV- D
• D. I- B, II- C, III- D, IV- A

Answer 1

The correct option is A I- A, II- B, III- D, IV- C

The structures which are similar in their morphology, anatomy, genetics and embryology but dissimilar in their function are called as homologous organs. Organs such as bat's wing, wings of birds, seals flipper, forelimb of a horse, and human arm have a common underlying anatomy, that was present in their last common ancestors, therefore their forelimbs are homologous organs. Organs similar in shape and function but their origin, basic plan and development are dissimilar. For example, wings of a butterfly, bird, and bat. According to Aristotle, an environment is responsible for evolution. Evolution is a progressive approach. Slow evolution is non-progressive. Thus, option A is correct.