Corals and jellyfish belong to the phylum containing the
A. nematodes.
B. sponges.
C. annelids.
D. cnidarians.
E. flatworms.
D. cnidarians.
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Members of the genus Actinomyces are either facultative or strict anaerobes that require ________ for optimal growth.
Fill in the blank(s) with the appropriate word(s).
In addition to recording the lot number, date received, condition received, and expiration date, antisera should be:
a. discarded after each use. b. frozen upon arrival. c. dated when opened. d. tested by the supervisor first before any-one uses it.
Endotoxins in sterile injectable drugs could cause
A) infection. B) septic shock symptoms. C) giant cell formation. D) nerve damage. E) no damage, because they are sterile.
Assume that a dihybrid F2 ratio, resulting from epistasis, was 9:3:4. If a double heterozygote was crossed with the fully recessive type, what phenotypic ratio is expected among the offspring?
A) 1:2:1 B) 1:1:1 C) 12: 3: 1 D) 9:3:4 E) 1:1:2