The walls of the alveoli in the lungs are incredibly thin. explain how this structure is related to function in the body.

Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?

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.

What is the starting point in replication called