Which two cell types in placozoans make up the endoderm tissue layer? A)cover cells and cylinder cells
B)gland cells and cover cells
C)fiber cells and cover cells
D)gland cells and cylinder cells

Which is the correct order in the scientific process? ask a question ® form a hypothesis ® make an observation ask a question ® make an observation ® form a hypothesis make an observation ® form a hypothesis ® ask a question make an observation ® ask a question ® form a hypothesis

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 are reasons cells undergo cell division?