In a punnett square, what is each individual letter placed outside the box at the top

Why is it important to reduce the number of chromosomes in half when forming gametes for sexual reproduction?

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 usually (but not always) related to the metabolic processes of living organisms in its organic form?