Plants that produce scentless, inconspicuous flowers with enormous amounts of pollen are adapted to which type of
pollination?
a. wind
b. birds
c. bats
d. small rodents
e. insects
a
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The oxygen content of dry air in the atmosphere
A. varies depending on the altitude. B. is about 21.0%. C. is inversely proportional to the partial pressure of oxygen. D. is about 0.03%. E. is about 78.1%.
Calcium levels are primarily under the control of
a. calcitonin and thyroxine. b. parathyroid hormone and calcitonin. c. prolactin and oxytocin. d. parathyroid hormone and thyroxine. e. progesterone and ADH.
Which organ system delivers nutrients and
oxygen to the cells?
a. respiratory b. urinary c. digestive d. lymphatic e. circulatory
A cross of two medium height hybrid plants produces offspring that are dwarf, medium, and tall in a ratio of 1:2:1
This is an example of: a. variegation. b. hybrid vigor. c. incomplete dominance. d. epistasis.
e. a polygenic trait