The eggs of seed plants are fertilized within ovules, and the ovules then develop into ____________.
A. spores
B. seeds
C. fruit
D. gametophytes
B. seeds
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Why was Escherichia coli thought to be a dominant member of the human gut microbial community in the past? What populations ARE important in the human gut and what evidence do we have that the specific bacteria present are important for human health?
What will be an ideal response?
According to Stern's experiment described in Figure 6.17, which one of the following enzymes was shown to form an intermediate complex with its substrate(s)?
A. -galactosidase B. pepsin C. DNA polymerase D. lysozyme E. catalase
Athlete's foot is caused by
A. Aspergillus. B. Ergot. C. Candida. D. Claviceps. E. None of the choices provided.
A portion of an mRNA attached to a ribosome reads: 5? GACCAUUUUUGA 3? If a tRNA with a histidine amino acid attached is in the P site of the ribosome, a tRNA with which amino acid attached will enter the A site?
A) aspartic acid B) proline C) serine D) phenylalanine E) tyrosine