The study of embryonic development is used as evidence for evolution because:
A. DNA molecules are similar in closely related species.
B. closely related species can have very different kinds of embryos.
C. ancient ancestors of organisms looked like their embryos.
D. closely related species have embryos with homologous structures.

Which statements correspond to cellular respiration? co2 diffuses passively into the cell. co2 diffuses passively out of the cell. co2 must be pumped out of the cell. o2 diffuses passively when produced inside the cell. o2 diffuses passively when converted to co2. o2 is pumped in and forces co2 out.

How can you tell the difference between rough er from smooth er?

What is a limitation of using a chemical formula, such as c6h1206, to represent a compound? the chemical formula does not show the types of elements that make up the compound. the chemical formula does not show how the atoms are connected to one another the chemical formula does not show the number of atoms of each element in a molecule. the chemical formula does not show the chemical symbols of the elements in the compound