Which of the following is true about external fertilization?

a. a large number of offspring are produced.
b. only a few gametes are produced.
c. it occurs in all mammals.
d. it does not require water.

Environmental differences within ecosystems are generally caused by

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.

Most of the carbon on earth is stored in the form of