What is one main difference between the cell wall and the cell membrane?
a the cell wall is more fragile than the cell membrane.
b cell walls are only found surrounding animal cells.
c the cell wall is more rigid than the cell membrane.
d cell membranes are only found surrounding plant cells.

Monkeys and humans share many of the same dna sequences and have similar proteins, indicating that a) the two groups belong to the same specie b) the two groups share a relatively recent common ancestor c) the two groups first appeared on earth at about the same time d) monkeys evolved from humans