Under what condition does hemoglobin tend
NOT to release oxygen?
a. low oxygen concentrations
b. warm temperatures
c. low pH
d. low carbon dioxide concentrations
e. all of these are conditions under which
hemoglobin tends to release oxygen
D
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Natural selection _____
A) is a random process B) creates beneficial mutations C) eliminates harmful mutations D) can favor beneficial mutations
The muscle pictured above would most likely be found where in the body?
A. attached to the skeleton B. in the heart C. in the walls of the blood vessels D. in the intestines E. in the lungs
An animal that maintains its body temperature by using heat generated from its own metabolism is a(n)
A. amniote. B. thermophile. C. endotherm. D. ectotherm. E. mesophile.
Which of the following is not involved in the increase in blood volume in a pregnant woman?
A. renin-angiotensin-aldosterone mechanism B. an increase in blood oxygen levels C. artery expansion D. progesterone E. sodium and water retention