The vector does not have to show signs and symptoms of a disease to be able to spread it to a human. ?
Indicate whether the statement is true or false
True
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What technique(s) can be used to characterize the phylogenetic composition of a microbial community without culturing any of the members?
A) green fluorescent protein tagging B) stable isotope techniques C) radioisotope experiments D) fluorescent in situ hybridization
In what way are vitamins and essential amino acids similar in human metabolism?
A. Both are integral parts of membrane lipids. B. They cannot be synthesized and must be ingested. C. Both are needed to synthesize steroid hormones. D. They are derived from the same precursor molecules. E. Both contain metal ions.
The first true hominids in the fossil record are
a. Australopithecus. b. Homo habilis. c. the chimpanzee. d. Homo sapiens.
Which of the following is true of an asymmetric carbon atom?
A) Only amino acids have asymmetric carbon atoms. B) A carbon with hydrogens attached at two locations is usually asymmetric. C) A carbon with hydrogens attached at three locations is usually asymmetric. D) Asymmetric carbon atoms create stereoisomers. E) Molecules may have only one asymmetric carbon atom.