Mating a true-breeding pink rose plant with a true-breeding pink rose plant will produce:a
plants with pink, red, and white roses.
b. only plants with pink roses.
c. plants with red or white roses in a 3:1 ratio.
d. plants with white or red roses in a 3:1 ratio.
e. None of these
B
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Drosophila eggs acquire an initial asymmetry before fertilization as a result of
A. production of bicoid proteins in one end of the egg. B. maternal DNA molecules being deposited in one end of the egg. C. nurse cell migration to one end of the egg. D. maternal mRNA being deposited in one end of the egg. E. attachments of cadherins to one end of the cell.
Which of these is INCORRECT concerning inspiration?
a) rib cage moves up and out b) diaphragm contracts and moves down c) pressure in the lungs decreases, and air comes rushing out d) the lungs expand because air comes rushing in
The primate ancestors, tree-dwelling insectivores, had two distinct evolutionary advantages: grasping fingers and toes, and
A. a complete digestive tract. B. hair. C. binocular vision. D. mammary glands.
Secondary metabolites are often useful, and are obtained by
A) harvesting a culture during log phase. B) allowing a culture to enter stationary phase. C) growing a culture at sub-optimal temperature. D) adding chemicals that alter metabolic pathways. E) using continuous flow culturing.