Members of the porifera phylum have
a. no skeleton.
b. an exoskeleton.
c. an endoskeleton.
d. either an exoskeleton or endoskeleton, depending on the species.

What are some things that limit population growth?

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.

Nh3 +02-no + h20 is unbalanced what is the balanced equation