Which of the following statements about enzymes is not true?

a. enzymes are proteins.

b. all enzymes have the same shape as their substrates.

c. enzymes work best at a specified ph.

d. the shape of an enzyme allows it to do its job.

Eutrophication caused by human nutrient pollution.

Which one is an advantage of external fertilization a. the offspring are genetically identical to the parents b. more eggs can be fertilzed at one time c. more sperm can be released at one time d. more protection is available for developing plz

Which body region are part of the cephalic region?