False, I'd say. Mammals usually adapt based on environment. Now, I know predators are "apart" of the environment, but I don't think that'd be it. I'd bet more money on saying mammals evolve based on environment adaptation. Sorry if I didn't answer your question or if I didn't get my point across well.
The genotype of a normal male zygote is XY, with the X chromosome (sex chromosome) coming from the mother and Y from the father.
Answer:
A couple of examples
<u>amylase</u>: break down starch into sugar.
<u>protease</u>: break down proteins into amino acids.
<u>lipase</u>: break down lipids (fats and oils) into fatty acids and glycerol.
