Of the following features, which is the most widely shared in the animal kingdom?
A. protostome development
B. radial cleavage
C. molting of a cuticle or exoskeleton
D. a body plan with symmetry
E. a triploblastic embryo
D. a body plan with symmetry
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In addition to mutation, what other mechanism allows for new genetic information to be introduced into a population? Explain your answer.
What will be an ideal response?
The male and female reproductive systems of an adult each include
A) gonads, tubes, gametes, hormones and secretions. B) ambiguous structures that give rise to male or female structures at puberty. C) spermatids, polar bodies, and oocytes. D) 200 to 600 million spermatocytes and a few thousand oocytes.
Mammals are thought to be living descendants of ____
a. anapsids b. archosaurs c. lepidosaurs d. synapsids e. diapsids
What is the name of the replication unit in prokaryotes, and how does it differ in eukaryotes?
What will be an ideal response?