Question:
Regulative embryos are produced by:
Regulative embryos are produced by:
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Deuterostomes show regulative development; protostomes show mosaic development.
Updated On: Jun 19, 2026
- Protostomes
- Deuterostomes
- Sponges
- Tape worms
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The Correct Option is B
Solution and Explanation
Step 1: Understand embryonic development types.
In animal development, embryos are classified based on their developmental pattern as regulative or mosaic types depending on cell fate determination.
Step 2: Define regulative embryos.
Regulative embryos are those in which the fate of cells is not rigidly fixed in early stages, and cells can adjust and form complete organisms even if separated.
Step 3: Link with deuterostomes.
Deuterostomes exhibit regulative development where early embryonic cells retain the ability to form a complete organism if isolated.
Step 4: Analyze protostomes.
Protostomes generally show mosaic development, where cell fate is determined early and is less flexible compared to regulative development.
Step 5: Evaluate other options.
Sponges and tapeworms do not represent standard embryonic regulative developmental patterns in this classification context.
Step 6: Conclusion.
Therefore, regulative embryos are characteristic of deuterostomes.
In animal development, embryos are classified based on their developmental pattern as regulative or mosaic types depending on cell fate determination.
Step 2: Define regulative embryos.
Regulative embryos are those in which the fate of cells is not rigidly fixed in early stages, and cells can adjust and form complete organisms even if separated.
Step 3: Link with deuterostomes.
Deuterostomes exhibit regulative development where early embryonic cells retain the ability to form a complete organism if isolated.
Step 4: Analyze protostomes.
Protostomes generally show mosaic development, where cell fate is determined early and is less flexible compared to regulative development.
Step 5: Evaluate other options.
Sponges and tapeworms do not represent standard embryonic regulative developmental patterns in this classification context.
Step 6: Conclusion.
Therefore, regulative embryos are characteristic of deuterostomes.
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