Blastopore develops into mouth in

Options

A. protostomes
B. deuterostomes
C. enterocoelomates
D. echinoderms

Answer

**Step-by-Step Solution:**

1. **Understanding the Terms:**
- The term "blastopore" refers to the first opening that forms during the early stages of embryonic development in animals.
- Animals can be classified based on the fate of the blastopore into two main groups: protostomes and deuterostomes.

2. **Defining Protostomes:**
- In protostomes, the blastopore develops into the mouth of the organism. This means that the first opening that forms during development becomes the mouth, while the anus forms later from a different opening.

3. **Defining Deuterostomes:**
- In contrast, in deuterostomes, the blastopore develops into the anus, and the mouth forms from a second opening that develops later. This group includes echinoderms and chordates.

4. **Analyzing the Options:**
- Option A: Protostomes - Correct, as the blastopore develops into the mouth.
- Option B: Deuterostomes - Incorrect, as the blastopore develops into the anus.
- Option C: Enterocoelomates - This term refers to a group of animals that develop their coelom from pouches of the archenteron, but it does not specifically indicate the fate of the blastopore.
- Option D: Echinoderms - Incorrect, as they are deuterostomes where the blastopore becomes the anus.

5. **Conclusion:**
- Based on the definitions and the analysis of the options, the correct answer is **Option A: Protostomes**, where the blastopore develops into the mouth.