There is a large concentration of which of these inside muscles?
A. protein
B. enzyme
C. peptides

Sea stars, sea urchins, sand dollars, and brittle stars are all memeber of a group, what is the common name of the group they are all in

Study the picture of the ocean. which is the best example of an organism’s niche shown in the picture? a. the environment contains several of the same species of coral. b. the shallow area of the ocean meets the needs of the coral and the fish. c. the ocean has fish and coral that live in the same area. d. the coral take in food from the water and provide shelter for the fish.

Read each description below and determine to which stage of sleep each pertains. then click and drag each box into the appropriate category below.