Retroviruses are characterized by
a. an RNA core.
b. integrating DNA into the host’s chromosome.
c. the enzyme reverse transcriptase.
d. having one strain that causes AIDS.
e. all of these.
Answer: e
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Phylogenetic trees are usually constructed using either a distance-based ________ approach, or a characteristic ________ approach.
Fill in the blank(s) with the appropriate word(s).
In plants like the fern, haploid cells produced by meiosis divide by ________, forming a multicellular haploid phase.
A. budding B. mitosis C. meiosis D. binary fission
Respond to the following statements with reference to the five trophic categories listed below.
A. B. A herbivore is this. C. A bear eating blueberries is functioning as this. D. A Venus flytrap devouring an insect to obtain nitrogen functions as this. E. A bear feeding on an adult salmon (which eats other fish, squid, and shrimp) is functioning as this. F. Most fungi function as this.
Benzoic acid is largely a(n) (antifungal/antiprotozoal/pickling) agent and does not affect the growth of many bacteria.
Fill in the blank(s) with the appropriate word(s).