Question

When is the development of an organ called indirect?

Answer 1

Explanation:

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During indirect development, the fertilized egg divides many times to produce a hollow ciliated ball of cells (blastula); cleavage is total, indeterminate, and radical. The blastula invaginates at one end to form a primitive gut, and the cells continue to divide to form a double-layered embryo

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Answer 2

Explanation:

a development is called indirect development , when an animal's birth form is very different from the adult form. The embryo hatches from the egg in a larval form. It occurs in most of the invertebrates and amphibians. The larva undergoes a drastic metamorphosis in order to achieve its adult stage...