In some cases, the blastomere can produce a complete embryo so, 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
The answer is Radial and indeterminate. In radial cleavage, the cells divide along a vertical axis, creating a stack of cells. This type of cleavage is indeterminate, meaning that each cell has the potential to develop into a complete embryo. In spiral cleavage, the cells divide along a diagonal axis, creating a spiral pattern of cells. This type of cleavage is determinate, meaning that each cell has a predetermined fate.
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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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