The nutrition of some plants depends on a mutually beneficial association between a root and a fungus. The association is known as a _____
a. root nodule c. root hair
b. mycorrhiza d. root hypha
B
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Which of the following are parts of the brain?
A. brain stem B. cerebellum C. diencephalon D. cerebrum E. central canal F. spinal cord
A bacterial culture has been exposed to UV radiation and is preparing to repair the DNA damage. Describe two mechanisms of repair used by E. coli to repair UV-induced DNA damage
Would you expect the bacteria to be able to repair more of the damage or less of the damage if they were placed in a dark environment after UV damage?
What form of nitrogen can most plants absorb and use directly?
A) nitrite and nitrate B) nitrate only C) ammonium and nitrogen gas D) nitrate and ammonium
Which of the following statements is true?
A) The temperate deciduous forest is composed of a high diversity of deciduous trees that lose their leaves in the fall because of low soil fertility. B) Agriculture is often not very successful in grasslands because of the poor soils. C) The high species diversity of a tropical rain forest is supported by a high diversity of soil organisms, high soil fertility, and high rainfall. D) Agriculture is often not very successful in a tropical forest because of the poor soils.