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
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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
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.
The highest point on a reef is called the:
a. reef crest. b. reef flat. c. reef front. d. back reef. e. leeward edge.
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