Why do living things use enzymes instead of heat as a source of activation enegry

Which of the following is something every person can do plz asap apex

The eruption of a nearby volcano causes a prairie ecosystem to receive a lot less sunlight. which of these is the most likely effect on the ecosystem? a-an increase in biodiversity. b-an increase in immigration to the area. c-a decrease in available water. d-a decrease in plant growth.

What do we call an individual that has inherited two identical alleles for the same trait? a. homozygous b. heterozygous c. monozzygous