If peach trees growing in specific mild climates of

the southern United States do not receive about 850
hours of temperatures below 40 degrees, they will
not produce flowers in the spring. This effect is
explained by which of the following terms?
a. photoperiodism
b. phototropism
c. senescence
d. vernalization
e. dormancy


Answer: d

Biology & Microbiology

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The volcanic oceanic island of Krakatoa is located in Indonesia. In 1883, this island experienced a massive volcanic explosion that killed most of the plants and animals living on the island

For the following set of organisms, indicate the order in which you would expect the number of species on the island to return to the pre-eruption equilibrium number. A. lizards, birds, butterflies, beetles B. birds, lizards, butterflies, beetles C. birds, butterflies, lizards, beetles D. birds, butterflies, beetles, lizards

Biology & Microbiology

The vessels that carry blood away from the heart in a closed circulatory system are referred to as

A. arteries. B. veins. C. capillaries. D. sinuses. E. auxiliary hearts.

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Stable isotope analysis to indicate whether or not certain elements have been processed by an organism is based on the observation that

A. microbes generally prefer using the lighter of two stable isotopes. B. microbes have no preference as regards heavy versus light isotopes. C. microbes generally prefer using the heavier of two stable isotopes. D. None of the choices are correct.

Biology & Microbiology

If all the offspring of a testcross are alike and

resemble the organism being tested, then that parent is a. homozygous dominant. b. homozygous recessive. c. heterozygous. d. recessive. e. incompletely dominant.

Biology & Microbiology