The development of the cell theory involved
a. different ideas from different scientists.
b. the efforts of one scientist.
c. work with computer models.
d. complete agreement among scientists.

Which element provides strength to the exoskeleton of clams and oysters

The wings of insects, birds, and bats evolved independently but carry out similar functions. this is an example of a. analogous structures. b. embryonic structures. c. vestigial structures. d. homologous structures.

Which phase of the cell cycle ensures that identical copies of the dna are made for daughter cells?