Diluted acetic acid, CH3COOH, is commonly called vinegar. How many atoms of hydrogen are present in one
molecule of acetic acid?
a. one
b. two
c. three
d. four
e. five
ANSWER: d
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Two frog populations (same species) living in two neighboring lakes sing slightly different courtship songs. Increased irrigation makes the land between the two lakes wetter, allowing frogs to expand their ranges to the area between the lakes
Females in both populations prefer loud frogs to quieter frogs, but do not distinguish between the two slightly different songs. Assuming that courtship song differences have a genetic basis, predict what will likely happen to the songs of the two frog populations. A) The songs will become more similar to each other. B) Males will become louder. C) Disruptive selection will cause the songs to differentiate even more. D) Genetic drift will cause the songs to differentiate even more. E) You cannot predict a change in the courtship songs at the two lakes.
In the case of temperature regulation, integration is accomplished by
(a) a receptor in the brain. (b) a center in the brain. (c) muscles and glands. (d) none of the above.
A selective breeding program is trying to develop an agircultural plant with decreased stem length to aid in mechanical harvesting
The mean stem height of the popluation is 36 cm while the mean stem height of the parents is 30 cm and the mean stem height of the offspring is 33 cm. What is the realized heritability for stem height in this crop? A. 1 B. 3 C. -3 D. 0.1
According to the figure, the most effective wavelength for photosynthesis is revealed by algae exposed to ____
nanometers.
a. 680 b. 700 c. 400 d. 425 e. 550