Stems and leaves of vascular plants arise from ________.
A. Food-conducting cells
B. Vessel elements
C. Water-conducting cells
D. Apical meristems
E. Lignified tracheids
Answer: D. Apical meristems
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The application called multiple strand displacement amplification is a powerful tool because
A. it provides errorless sequencing results for that microorganism. B. it provides data on the pathogenic nature of the microorganism. C. it identifies the transcriptome of the microorganism. D. it allows single-cell genomic sequencing that can analyze uncultivated microorganisms.
Geosmins are
A. a strain of Bacillus. B. nitrogen-fixing bacteria. C. metabolites that give soil its odor. D. produced by Rhizobium. E. metabolites that give soil its odor AND produced by Rhizobium.
You read that the frequency of a particular disease-associated recessive allele in a population is 12%. What does that mean?
A) 12% of the population has the disease caused by that allele. B) 12% of the population is a carrier for that disease. C) For every 100 people, there are 12 copies of the allele. D) The allele is present in 12% of the cells in your body.
Humans are the only hosts of Rickettsia rickettsii.
Answer the following statement true (T) or false (F)