Which statement is not true about how various conditions will effect the activity of an enzyme?
a. optimal temperatures generally enhance the activity of an enzyme.
b. above a certain range of temperatures, the protein of an enzyme is denatured.
c. a change in ph can cause an enzyme to be denatured.
d. an enzyme's activity will decrease with an increase in substrate concentration.
e. when sufficient substrate is available, the active site of an enzyme will nearly always be occupied.

Option (d).

Explanation:

Enzymes are bio-catalyst that can increase the rate of a biochemical reactions occurring in the body of living organisms. The enzymes work at the optimum temperature and pH conditions.

The activity of the enzyme may also be affected by the substrate concentration. The increase in the substrate concentration increases the enzymatic activity at the level and maximum when the enzymes occupy all the site. The enzyme activity will never decrease with the increase of substrate concentration.

Thus, the correct answer is option (d).

i think it's c

answer: decrease

a limiting factor is the one which decrease the abundance, distribution and causes extinction of the population of species in a ecosystem. here, predators including hawks, owls and snakes are the limiting factor for the population of mexican free tailed bat.   although bats are nocturnal animals as they forge for food at night these predators also may remain active during night which can decrease the population of the mexican free-tailed bats. also, these bats eat only one type of insects that are moths. the food can also be a limiting factor as all 400 members are dependent upon same type of food needs that are moths. the decrease in the moth population can cause decrease in population size of the mexican free-tailed bats.

therefore, the scenarios will most likely to decrease the population size of the mexican free-tailed bats.