Question

Siamese cats are characterized by light and dark regions of fur. The darker parts occur on the cooler parts of the cat's body because the enzyme that catalyzes the formation of the dark pigment is more active when cool. This example shows the enzymes are affected by......A) temperture, B) concentration, C) pH, or D) all of these.

Answer 1

I think it's D but it could be A

Answer 2

it's A-temperture