Question:
In some non chordates, during embryonic development, mesoderm occupies only a part of blastocoel adjoining ectoderm. The unoccupied portion of blastocoel persists as.
In some non chordates, during embryonic development, mesoderm occupies only a part of blastocoel adjoining ectoderm. The unoccupied portion of blastocoel persists as.
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Pseudocoelom is a body cavity found in some invertebrates where the cavity is not entirely lined by mesoderm, unlike in coelomates.
Updated On: Mar 25, 2025
- Haemocoel
- Schizocoelic coelom
- Enterocoelic coelom
- Pseudocoelom
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The Correct Option is D
Solution and Explanation
Pseudocoelom Formation in Non-Chordates
- A: Haemocoel is a body cavity found in invertebrates, but it does not describe the unoccupied blastocoel. (❌ Incorrect)
- B: Schizocoelic coelom is formed by mesoderm splitting in some animals, not by the unoccupied blastocoel. (❌ Incorrect)
- C: Enterocoelic coelom forms from pouches of the archenteron, not from an unoccupied blastocoel. (❌ Incorrect)
- D: Pseudocoelom is the correct term, as it refers to the cavity that remains unoccupied by mesoderm in non-chordates. (✔ Correct)
Thus, the correct answer is (D).
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