Pollen comes from the
A. carpel.
B. anther.
C. stigma.
D. style.
E. petal.
Answer: B
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Which of the following is a correct pairing of a base to the product of its deamination?
A. thymidine ? uracil B. cytosine ? thymine C. adenine ? xanthine D. guanine ? hypoxanthine E. 5-methylcytosine ? thymine
Ammonium chloride is a commonly used salt in minimal media. The reason ammonium chloride is
used is because:
a. it is an organic source of carbon. b. it provides nitrogen. c. it jellifies the media. d. it liquefies the media. e. it sterilizes the media.
Which of the following protist groups does NOT include members that move by means of flagella?
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In 2012, scientists studied modern Marchantia liverwort plants and observed that they not only are able to make their own food using energy from sunlight but they also absorb carbon from plant material in aquatic environments. They classified this plant
as a A) chemoheterotroph. B) photoautotroph. C) mixotroph. D) chemoautotroph.