Which of the following is not a main component of an ecosystem?
A. Food chains and webs
B. Physical surroundings, such as rocks, soil and water
C. Living organisms
D. Living and non-living factors that make up the environment.

We want most cells to be even in and out which is called

Why does meiosis produce cells with half the chromosomes? o a. most of the chromosomes are not necessary to keep an organism alive. b. a gamete needs only half the number of chromosomes because two gametes join together. o c. it makes the gametes easier to move around in the organism. o d. it is faster to produce gametes with fewer chromosomes.

Hector is back from his morning run and is feeling light-headed because his energy is depleted which food item will provide him with a quick source of carbohydrates