Given below are four statements (A-D) each with one or two blanks. Select the option which correctly fills up the blanks in two statements :
Statements :
(A) Wings of butterfly and birds look alike and are the rsults of "___" (i) "____" evolution
(B) Miller showed that `CH_(4),H_(2),NH_(3)` and "____" (i) "____", when exposed to electric discharge in flask resulted in formation of "____" (ii) "____"
(C) Vermiform appendix is a "____" (i) "____" organ and an "_____" (ii) "____" evidence of evolution.
(D) According to Darwin evolution took place due to "____" (i) "___" and "____" (ii) "_____" of the fittest.

Options

A. (A) -(i) convergent
(B)- (i) oxygen, (ii) nucleosides
B. (B)-(i) water vapour, (ii) amino acids,
(C)-(i) rudimentary (ii) anatomical
C. (C)-(i) vestigial, (D) - (ii) anatomical,
D. (D)- (i) small variations, (ii) survival
(A) - (i) convergent

Answer

To solve the question, we need to fill in the blanks in the statements A-D correctly. Let's analyze each statement step by step.

### Step-by-Step Solution:

**Statement A:**
- The wings of butterflies and birds look alike and are the results of "___" (i) "____" evolution.
- **Answer:** Convergent (i) evolution.
- **Explanation:** Both butterflies and birds have wings that serve the same function (flying) but evolved independently without a common ancestor, which is characteristic of convergent evolution.

**Statement B:**
- Miller showed that `CH₄, H₂, NH₃` and "____" (i) "____", when exposed to electric discharge in a flask resulted in the formation of "____" (ii) "____".
- **Answer:** Water (i) vapor, Organic compounds (ii).
- **Explanation:** Miller's experiment included methane (CH₄), hydrogen (H₂), ammonia (NH₃), and water (H₂O). The electric discharge simulated lightning, which led to the formation of organic compounds like amino acids.

**Statement C:**
- Vermiform appendix is a "____" (i) "____" organ and an "_____" (ii) "____" evidence of evolution.
- **Answer:** Vestigial (i) organ, anatomical (ii).
- **Explanation:** The vermiform appendix is considered a vestigial organ because it has lost its original function over time. It serves as anatomical evidence of evolution, indicating a structure that was once functional in ancestral species.

**Statement D:**
- According to Darwin, evolution took place due to "____" (i) "___" and "____" (ii) "_____" of the fittest.
- **Answer:** Small variations (i), survival (ii).
- **Explanation:** Darwin's theory of evolution is based on the concepts of small variations that occur in species and the survival of the fittest, which is the mechanism of natural selection.

### Final Answers:
- **A:** Convergent (i) evolution.
- **B:** Water (i) vapor, Organic compounds (ii).
- **C:** Vestigial (i) organ, anatomical (ii).
- **D:** Small variations (i), survival (ii).