A level in an energy pyramid is called a level

trophic

Explanation:

It's called a trophic level. Autotrophs are at bottom because they produce the food and then energy goes to herbivores and then carnivores.

i don't know. if i were you, i would search it up online : d

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.