What does a plant gain from a mycorrhizal relationship?
A) It allows roots to absorb water and solutes more rapidly.
B) It increases the surface area for photosynthesis.
C) It helps to break down complex molecules in the soil to release micronutrients.
D) It helps to break down decaying organic matter into essential plant nutrients.
A
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What is the correct sequence of steps during infection of plants by nitrogen-fixing bacteria?
A) Rhizobia release Nod factors; roots release flavonoids; rhizobia proliferate inside of root hair; infection thread grows into the root cortex; nodule forms. B) Rhizobia release flavonoids; roots release Nod factors; rhizobia proliferate inside of root hair; infection thread grows into the root cortex; nodule forms. C) Roots release flavonoids; rhizobia release Nod factors; rhizobia proliferate inside of root hair; nodule forms; infection thread grows into the root cortex. D) Roots release flavonoids; rhizobia release Nod factors; rhizobia proliferate inside of root hair; infection thread grows into the root cortex; nodule forms. E) Nodule forms; infection thread grows into the root cortex; rhizobia proliferate inside of root hair; rhizobia release flavonoids and Nod factors.
What category of enzyme adds a CCA to the 3' OH of tRNAs?
A. uridylyltransferase B. glycosyltransferase C. ligase D. guanylyltransferase E. nucleotidyltransferase
Which of the following is most logical from a
health perspective? a. Light skin and little exposure to sun. b. Light skin and extensive exposure to sun. c. Dark skin and little exposure to sun. d. Dark skin and lots of exposure to sun. e. Light skin and little sun, or dark skin and lots of sun
The honey possum (Tarsipes rostratus) is a tiny Australian marsupial that feeds entirely on nectar. Which of the following terms describes the role of a honey possum in its ecosystem?
A. Primary producer B. Secondary carnivore C. Herbivore D. Detritivore E. Primary carnivore