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.
(A)Wings of butterfly and bird look alike and are the results of (i), evolution.
(B) Miller showed that `CH_(4), H_(2), NH_(3)`, and (1) when exposed to electric discharge in a flask resulted in formation of (ii)
(C) Veriform 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, (D)-(i) small variations, (ii) survival
B. (A)-(i) covergent, (B)-(i) oxygen, (ii) nucleosides
C. (B)-(i) water vapour, (ii) amino acids, (C)-(i) homologous, (ii) anatomical
D. (C)-(i) vestigial, (ii) anatomical , (D)-(i) mutations, (ii) multiplication.

Answer

To solve the question, we need to fill in the blanks in the four statements (A-D) with the appropriate terms related to evolution. Let's go through each statement step by step.

### Step 1: Analyze Statement A
**Statement A:** Wings of butterfly and bird look alike and are the results of (i) ______ evolution.

- The wings of butterflies and birds are examples of structures that have similar functions but evolved independently in different lineages. This is known as **convergent evolution**.

**Fill in the blank:**
(i) convergent

### Step 2: Analyze Statement B
**Statement B:** Miller showed that CH₄, H₂, NH₃, and (1) ______ when exposed to electric discharge in a flask resulted in formation of (ii) ______.

- In the Miller-Urey experiment, the gases used included methane (CH₄), hydrogen (H₂), ammonia (NH₃), and **oxygen**. The experiment aimed to simulate early Earth conditions to see if organic compounds could form.
- The result of this experiment was the formation of **amino acids**, which are the building blocks of proteins.

**Fill in the blanks:**
(1) oxygen
(ii) amino acids

### Step 3: Analyze Statement C
**Statement C:** Veriform appendix is a (i) ______ organ and an (ii) ______ evidence of evolution.

- The veriform appendix is considered a **vestigial** organ, which means it is a remnant of a structure that had a function in ancestral species but is no longer functional in the current organism.
- It serves as **anatomical** evidence of evolution, showing how species have changed over time.

**Fill in the blanks:**
(i) vestigial
(ii) anatomical

### Step 4: Analyze Statement D
**Statement D:** According to Darwin, evolution took place due to (i) ______ and (ii) ______ of the fittest.

- Darwin proposed that evolution occurs through **natural selection**, which involves variations among individuals in a population.
- The phrase "survival of the fittest" refers to the idea that those individuals best adapted to their environment are more likely to survive and reproduce.

**Fill in the blanks:**
(i) natural selection
(ii) survival

### Final Answers
Now, let's summarize the filled statements:

(A) Wings of butterfly and bird look alike and are the results of **(i) convergent** evolution.
(B) Miller showed that CH₄, H₂, NH₃, and **(1) oxygen** when exposed to electric discharge in a flask resulted in formation of **(ii) amino acids**.
(C) Veriform appendix is a **(i) vestigial** organ and an **(ii) anatomical** evidence of evolution.
(D) According to Darwin, evolution took place due to **(i) natural selection** and **(ii) survival** of the fittest.