Oxygen is carried in the blood by red blood cells. At high altitudes, the body cannot take in as much oxygen because of the low atmospheric pressure, so to compensate, the body produces more red blood cells. Even when one returns to low altitudes, these extra red blood cells remain for about two weeks. Using this information, propose a reason why athletes often train at high altitudes before a competition.

Is genetic diversity the same as genetic variation?

Plants need carbon dioxide from their environment to produce glucose during which stage of photosynthesis?

Which of the following describes research that would be considered basic science? a. a farmer is trying to improve his crop yields by using a new kind of fertilizer. b. a college students is curious about the growth of desert pants in the presence of excess amounts of water. c. government officials are trying to prevent the spread of new strain of influenza virus. d. a doctor is trying to determine why a patient is feeling tried and sick. b.a college students is curious about the growth of desert pants in the presence of excess amount of water