Which is true about the invertebrates?

a. They are all deuterostomes.
b. Among these animals, the initial indentation in the embryonic ball always becomes the anus.
c. All invertebrates share bilateral symmetry.
d. They include the simplest living animals.
e. Invertebrates only have a simple backbone.


D

Biology & Microbiology

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A primary oocyte is indicated by

a. A. b. B. c. C. d. D. e. E.

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Which of the following structures gives rise to endosperm?

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If you were following the inheritance patterns of two different sets of multiple alleles located on

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