Chromosome condition in which a diploid cell has one less chromosome than normal; designated as 2n-1.
What will be an ideal response?
monosomy
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Agave americana is a monocarpic plant (it has a single carpel). Once it flowers (reproduces), it dies
Although these plants can be very long-lived before flowering (10–30 years, on average), there is no continued growth after floral meristem replaces apical meristem tissues. The floral stalk can reach heights of more than 5 meters, and takes all the carbohydrate reserves of the plant. Based on your knowledge of plant growth and development, which of the following statements is a plausible explanation for death after flowering in A. americana? A. Once the floral meristem develops, auxin is no longer produced and only lateral meristems can grow. B. There are no lateral meristems in A. americana, so growth does not occur after flowering and the plant dies. C. There are no apical or lateral meristems in A. americana; the stalk only grows because of division and elongation of floral meristem. D. After flowering, an individual A. americana knows it has reproduced, so dies because it has ensured its inclusive fitness by contributing to the next generation.
One benefit of transpiration is that it:
a. concentrates nutrients in plant leaves. b. distributes nutrients throughout the plant. c. moves water from the atmosphere to the plant. d. is responsible for warming plants. e. brings in water from the soil.
A prescription medication lists a rare side effect of impairing the movement of smooth muscle. This medication could potentially affect the:
A) walls of the small intestine. B) heart. C) muscles that move your arms and legs. D) muscles that move the eyeballs.
Fever is beneficial during viral infection because the higher temperature
A. inactivates interferons. B. increases vasodilation, contributing to inflammation. C. increases sweating and consequently the barrier effect. D. prevents viral infection of fibroblasts. E. increases the effectiveness of interferons.