Spiral and determinate cleavage is found in the embryo of:
Correct answer: B. Leech
- A. Frog
- B. Leech
- C. Pigeon
- D. Brittle star
Explanation
Explanation: Spiral cleavage is a type of embryonic development in which cells divide at oblique angles, resulting in a helical arrangement. Determinate cleavage means that the fate of each embryonic cell is determined early in development. This pattern is characteristic of many protostomes, such as leeches.
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