In some cases, blastomere can produce a complete embryo. The cleavage will be?
Correct answer: D. Radial and indeterminate
- A. Spiral and determinate
- B. Spiral and indeterminate
- C. Radial and determinate
- D. Radial and indeterminate
Explanation
Option A: In spiral cleavage the division of cells in the developing embryo is in a spiral manner and blastomeres are not formed. Also, a complete embryo is not formed in determinant cleavage thus this option is incorrect.Option B: Though indeterminate cleavage results in a complete embryo, it will not have blastomeres as it will be in spiral manner thus this option is incorrect.Option C: Though radial cleavage produces blastomeres, determinant ones don't produce a complete embryo hence this option is incorrect.Option D: This is the correct option because the radial cleavage will produce blastomeres and indeterminate means that a complete embryo will be formed.
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About Kingdom Animalia
Animals are multicellular, heterotrophic eukaryotes whose cells lack cell walls and chloroplasts, with specialised tissues in most groups. Coverage includes body symmetry, tissue layers, coelom, segmentation and levels of organisation, plus major phyla such as Porifera, Cnidaria, Platyhelminthes, Annelida, Arthropoda, Mollusca and Chordata.
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