The ability of water to hold more heat than land keeps the temperature on Earth A) moderate. B) the same. C) very low. D) very high.

True or false? the driving force for the unloading of oxygen from hemoglobin into tissues is the difference in pco2 levels between the blood and body tissues.

Clarity why a diagram of evolution looks more like a bush than a straight line

If his sperm count is less than 20 million per millimeter, a man is considered a. impotent. b. hormone intolerant. c. infertile. d. sterile.

He definition of mutation is "any heritable change in the genetic material." the qualifier "heritable" is necessary because

When waste and production byproducts are reduced, what is a likely effect? A. expenses are reduced B. disposal rates go up C. transportation needs increase D. expenses are increased

Which of the following is a part of the digestive system? Capillary Diaphragm Ovary Saliva

An important characteristic of animals is that all of their cells works the same way, they do not have any specialization. True or False?

When a muscle is unable to respond to stimuli temporarily, it is in which of the following periods? A) latent periodB) fatigue periodC) relaxation periodD) refractory period

Evan and his friends are so surprised to find deer in their subdivision! His mom is getting mad because every morning they are in the garden eating everything they see.

HURRY! Which best describes the structure of the molecules that make up proteins? O A. Carbon + hydrogen + oxygen B. Phosphate + sugar ring + nucleotide base O C. Hemoglobin + oxygen + iron O D. Carboxyl group + amino group + side chain