After a human sperm penetrates an egg, a fertilization envelope forms. this membrane _____.

An e. coli cell without a functional laci gene is expected to _____.

An ovum bursts from one of a womans two __________ and is drawn into one of two __________.

Archaea has no _________________. as a result, it is unable to form the 30 nm fiber of chromatin.

Arteries are most accurately defined as blood vessels that ________.

At the onset of the embryonic period, the _____ appears. it will eventually become the neural tube.

The two molecules shown in the figure below are best described as _____.

The thin horizontal arrows in the figure above show that the _____.

With ____ selection(s), the allele frequency will shift in a consistent direction.

Varieties of staphylococcus aureus that are resistant to the drug methicillin _____.

The theory of modern synthesis states that evolution involves changes in a population's _____.