Which of these classification categories contains the closest related organisms?
(a). domain
(b). genus
(c). family
(d). phylum
(e). kingdom
Answer: (b). genus
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When planting seeds, why should you plant more seeds than you expect to grow?
a. Animals may eat some seeds. b. Some seeds may not germinate. c. The wind may disperse some seeds to an unsuitable environment. d. all of these
In a hypothetical situation, the genes for sex pilus construction and for tetracycline resistance are located on the same plasmid within a particular bacterium
If this bacterium readily performs conjugation involving a copy of this plasmid, then the result should be the _____. A) temporary possession by this bacterium of a completely diploid genome B) rapid spread of tetracycline resistance to other bacteria in that habitat C) subsequent loss of tetracycline resistance from this bacterium D) production of endospores among the bacterium's progeny
A 0.1 ml sample of a log phase culture contains 10,000 bacterial cells/ml. It is added to 9.9 ml of fresh culture medium broth. Assume a generation time of 30 minutes, and no limiting nutrients. How many bacteria will be present in the entire broth
culture after five hours? A) 3.2 × 104 B) 5.0 × 105 C) 1.02 × 106 D) 6.0 × 106 E) 2.56 × 107
The wings of a bird and the wings of a butterfly are the result of ________ evolution
Fill in the blank(s) with correct word