Question

Pick up the correct answer regarding the enterocoelomates.

• A. Enterocoelomates are deuterostomes and they show radial and indeterminate cleavages
• B. All enterocoelomates are protostomes and they exhibit radial and indeterminate cleavages
• C. All enterocoelomates are deuterostomes and they exhibit spiral and indeterminate cleavages
• D. All enterocoelomates are deuterostomes and they exhibit spiral and determinate cleavages

Hint:

Radial and indeterminate cleavage is a key characteristic of deuterostomes, which includes groups such as vertebrates and starfish.

Answer 1

The Correct Option is A

To solve the problem, we need to identify the correct statement regarding enterocoelomates.

1. Understanding Enterocoelomates:
Enterocoelomates are animals in which the coelom (body cavity) forms by the outpocketing of the mesoderm. This type of development is typical of deuterostomes. Deuterostomes are characterized by radial and indeterminate cleavage during embryonic development, which differs from the cleavage pattern observed in protostomes.

2. Analyzing the Options:

Option A: "Enterocoelomates are deuterostomes and they show radial and indeterminate cleavages" is correct. Deuterostomes exhibit radial and indeterminate cleavage, where the fate of the cells is not predetermined early in development.
Option B: "All enterocoelomates are protostomes and they exhibit radial and indeterminate cleavages" is incorrect. Enterocoelomates are deuterostomes, not protostomes.
Option 3: "All enterocoelomates are deuterostomes and they exhibit spiral and indeterminate cleavages" is incorrect. Deuterostomes exhibit radial cleavage, not spiral cleavage.
Option 4: "All enterocoelomates are deuterostomes and they exhibit spiral and determinate cleavages" is incorrect. Enterocoelomates exhibit radial and indeterminate cleavage, not spiral and determinate cleavage.

3. Conclusion:
Based on the analysis, the correct answer is:

Final Answer:
The correct option is (A) Enterocoelomates are deuterostomes and they show radial and indeterminate cleavages.