If a signal molecule, called a ________, binds to the allosteric site of an enzyme, the enzyme’s active site will change shape.

Sperm has several components; the function of the acrosome is to _____.

If the sequence of one strand of DNA is CATTACGGG, then the complementary strand would be GTAATGCCC.

The total amount of formaldehyde required to preserve all of the protein in the body is 

Individuals clustered in the same area that release their gametes into the water at the same time are engaging in _____.

Plants are ________ because they can produce their own food through photosynthesis.

The common name for the product of plant secondary growth in stems is ________.

According to the pressure flow hypothesis of phloem transport,

A ________ is a group of organisms related by descent.

The movement of water across biological membranes can best be predicted by