Which phase comes immediately after cleavage?
a. fertilization
b. organ formation
c. gastrulation
d. gamete formation
e. tissue specialization
ANSWER: c
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When assessing the quality of a direct Gram stain, neutrophils should appear as:
a. cells with pink cytoplasm and darker more purplish nuclear lobes. b. cells with pink cytoplasm and pink nuclear lobes. c. cells with purple cytoplasm and pink nuc-lear lobes. d. cells with purple cytoplasm and purple nuclear lobes.
Which whorl of the flower contains the female reproductive parts?
A. whorl 2 B. whorl 3 C. whorl 1 D. whorl 4 E. whorl 5
Analysis of a water sample by a series of presumptive, confirmatory, and completed tests that provide an estimate of coliform numbers in the water is called the ________.
A. standard plate count B. most probable number (MPN) C. membrane filter method D. coliform count
Probes used for detecting genetic sequences are frequently composed of
A) agarose. B) synthetic nucleic acids and labeled conjugates, such as fluorescent dyes. C) restriction enzymes. D) silicon chips. E) nitrocellulose.