Which of the following statement is / are correct with regard to Deuterostomes ?
(a) The blastopore develops into anus in adult.
(b) The balstopore develop into mouth in adult.
( c) Cleavage is radial and indeterminate
(d) Cleavage is spiral and determinate .

Options

A. (a) and ( c)
B. (a) and (b)
C. (b) and (d)
D. (b) and ( c)

Answer

To determine which statements regarding Deuterostomes are correct, we can analyze each option step by step.

### Step-by-Step Solution:

1. **Understanding Deuterostomes**:
- Deuterostomes are a group of animals characterized by their embryonic development. The key feature is that the blastopore, which is the first opening that forms during embryonic development, becomes the anus in the adult organism.

2. **Analyzing Statement (a)**:
- "The blastopore develops into anus in adult."
- This statement is correct. In deuterostomes, the blastopore indeed develops into the anus.

3. **Analyzing Statement (b)**:
- "The blastopore develops into mouth in adult."
- This statement is incorrect. In deuterostomes, the blastopore does not develop into the mouth; it develops into the anus.

4. **Analyzing Statement (c)**:
- "Cleavage is radial and indeterminate."
- This statement is correct. Deuterostomes exhibit radial cleavage, where the cells divide in a symmetrical manner around the pole, and indeterminate cleavage, meaning that the fate of each cell is not predetermined early in development.

5. **Analyzing Statement (d)**:
- "Cleavage is spiral and determinate."
- This statement is incorrect. Spiral and determinate cleavage are characteristics of protostomes, not deuterostomes.

### Conclusion:
Based on the analysis:
- Correct statements: (a) and (c)
- Incorrect statements: (b) and (d)

Thus, the correct answer is that statements (a) and (c) are correct.

### Final Answer:
The correct statements regarding Deuterostomes are (a) and (c).

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