Why are trophic levels often displayed as a pyramid?
it is just an attractive way to show them.
it shows how there are many more of the lower levels than the higher ones.
it shows how large the animals are in the levels.
both b & c are correct.

Which description provides the best objective summary of the article in the passage?

Nephrons, the functional unit of kidneys, are responsible for formation of urine. the sentences describe situations that are the result of problems in the urine formation process. for the nephron shown below, match each situation to the step in the urine formation process where the problem lies.

In pea plants, yellow seed color (y) is dominant and green seed color (y) is recessive. based on the punnett squares, what are the chances that the offspring in the second generation will have green seeds? first generation y y y yy yy y yy yy second generation y y y yy yy y yy yy there is a % chance that the offspring will have green seeds.