When the circular muscles contract, the earthworm stretches, becoming longer and thinner. The earthworm uses its setae to anchor the front of its body in the soil. Now the longitudinal muscles contract and the earthworm becomes shorter and wider or it bends from one side to the other, pulling the body forward.
Answer:
Several different genes control height. ... distribution some plants are tall and some are short but most are in between what is most likely true about this trait apex
Yes very much so. Let's say the prey were snakes. The predators were birds. If many of the birds were wiped out, there are barely any limiting factors maintaining the snake population. The snake population can overpopulate and affect other species. If there were an abundance of birds, the snake population would decrease immensely, but then the bird population will soon run out of snakes and starve. This will then cause the bird population to suffer. As you can tell, both the prey and predator population effect each other immensely.
