A change in allele frequencies due to random chance is termed ________.
a) natural selection
b) genetic equilibrium
c) genetic drift
d) gene flow
Answer: c) genetic drift
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Why is the absence of atmospheric oxygen (O2) so important to the Oparin-Haldane hypothesis?
a. Oxygen is corrosive and thus would have degraded many of the metallic compounds on Earth's surface, releasing toxic gasses into the new atmosphere. b. Oxygen is more reduced than hydrogen gas, methane, or ammonia. c. Oxygen would have supported microorganisms that promote chemical decay. d. Oxygen is able to reverse reactions by removing electrons and hydrogen from organic molecules, thus destroying the first organic compounds as quickly as they developed. e. Oxygen would have caused multiple explosions, converting chemical energy into heat energy and rendering that energy unavailable for driving the synthesis of organic molecules.
the main substrates for gluconeogenesis are the three carbon long molecules of alanine, glycerol, and _________
Fill in the blank(s) with the appropriate word(s).
Which fuel is used most readily by the body during high intensity physical activities?
a. carbohydrates b. starch c. amino acids d. saturated fats
Which of the following statements is not true concerning the hypothalamus?
A. The hypothalamus regulates the internal environment of the body. B. The hypothalamus acts as the link between the nervous and endocrine systems. C. The hypothalamus produces antidiuretic hormone and oxytocin. D. The hypothalamus controls the glandular secretions of the pituitary gland. E. The hypothalamus communicates with the somatic nervous system.