Legumes, such as beans or peas
A) form mutualistic associations with nitrogen-fixing bacteria.
B) form mycorrhizal associations to increase nitrogen fixation in the soil.
C) form parasitic relationships with other photosynthetic plants.
D) fix N2 from the atmosphere in their leaves.
Answer: A) form mutualistic associations with nitrogen-fixing bacteria.
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a. thyroid b. parathyroid c. thymus d. hypothalamus e. anterior pituitary
__________ is rapid diversification into new species that occupy novel niches. Fill in the blank(s) with the appropriate word(s)
Which of the following is NOT true of a stress or "fight-or-flight" response?
A. Energy stores such as adipose tissue and glycogen are broken down to mobilize fatty acids and glucose. B. The heart rate increases and airways are dilated to promote maximum oxygen intake. C. Elevations in cortisol are needed to increase glucose. D. Catabolic hormones are activated. E. Leptin levels are increased to enhance appetite.
When looking at microarray data verses phenotypic behaviors in a model organism, you notice that certain genes seem to have lost their function. Therefore you decide to classify them as
A. pseudogenes. B. transposons. C. nonfunctioning introns. D. inactivated exons. E. templates.