Which of the following are characteristic of both rhizobia and mycorrhizae?

I) They both benefit by receiving sugars from the plant.
II) They both become parasitic in nutrient-rich environments.
III) They both enhance the growth of most plants.
IV) They both are found in most ecosystems of the world.
A) only I and II
B) only I, III, and IV
C) only III and IV
D) I, II, III, and IV


B

Biology & Microbiology

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The highest point on a reef is called the:

a. reef crest. b. reef flat. c. reef front. d. back reef. e. leeward edge.

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Four of the five answers listed below are parts of the forebrain. Select the exception

a. limbic system b. thalamus c. olfactory lobes d. cerebellum e. cerebrum

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Which of the following is an important model organism for the study of development?

A. Escherichia coli B. hepatitis C C. Drosophila melanogaster D. miRNA

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DNA replication

A) requires a type of RNA polymerase. B) is partially regulated by promoter/terminator sites. C) proceeds by making two continuous strands. D) is not edited once polymerization has occurred. E) is conservative.

Biology & Microbiology