Wheat is a group of grass species. Cultivation originated in the eastern Mediterranean about 10,000 years ago. In comparison to closely related wild grasses, cultivated wheat has shorter stalks and fewer, larger seeds that are firmly attached to the stalk
(e.g., they don't
blow away in the wind). How do these changes affect the evolutionary fitness of wheat?
A. Fitness is increased because the dispersal
of embryos is reduced.
B. Fitness is increased because the dispersal
is limited.
C. Fitness is decreased because more
energy is devoted to trying to grow longer
stalks.
D. Fitness is decreased because the seeds
are not dispersed.
D
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The presence of a specific plasmid in a bacterial cell may be determined if the plasmid _____
A. is exceptionally large B. is an expression vector C. contains pieces of a viral genome D. contains a selectable marker
With one exception, species of the genus Haemophilus require which of the following media ingredients for in vitro growth?
a. Vitamin K and hemin b. Hemin and nicotine adenine dinucleotide (NAD) c. Vitamin K and NAD d. Hemin and cysteine
During your annual checkup, your doctor informs you that your blood pressure is 120 over 90. Which statement is true?
a. Your systolic pressure is a little high. b. Your systolic pressure is a little low. c. Your diastolic pressure is a little high. d. Your diastolic pressure is a little low.
The oceanic zone is represented by letter ____
a. A b. B c. C d. D e. E