What are the three types of food cells need

A relationship between different species in which one species lives in or on another is

Which of the following is not one of the advantages that a closed circulatory system has over an open circulatory system? A. The contents of blood come into closer contact with tissues in a closed system than an open system B.

A drug that is meant to reduce blood pressure would have which of the following effects?

N the F2 generation of Mendel's crosses, all plants had the dominant trait. half of the plants had the dominant allele. all plants had both the dominant and recessive alleles. one in four plants had two alleles for the recessive trait.

Which is the best way to describe the fit between an enzyme and its substrate?

The food web in a diverse ecosystem is

How many ATP equivalents are made from convention of succinyl-CoA to oxaloacetate? Assume that re-oxidation of NADH via the electron transport chain yields the equivalent of 3 ATP, and that re-oxidation of FADH2 yields 2 ATP.

A situation where friction is desirable.

You discover an organism that has scaly skin and is aquatic but returns to the land to reproduce. what else would you expect to find in this organism?

Which systems act on the same organs but in opposite ways? a. the central and peripheral nervous systems b. the sympathetic and parasympathetic nervous systems c. the somatic and enteric nervous systems