What happens when the muscles in the stomach wall relax and contract? 1 Food is pulled through the esophagus.

2 Food is mixed with gastric juice.

3 Nutrients in food are moved into body cells.

4 Wastes are removed from the body.​

What is a universal way that predation benefits the predator? predation increases mate availability. predation in defense of space. the predator gets the energy it needs to survive. the predator keeps parasites from hurting the species.

This is the diveristy of ecosystems natural communites and habits it is the variety of ways that species interact with each other and their environment

What type of appendages do sponges cnidarians roundworms annelids mollusks arthropods echinoderms and vertebrate have? jointed, not jointed, absent