At what month of gestation can the fetus detect sound and light?
a. first
b. third
c. fourth
d. seventh
e. ninth
d
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Which of the following is an example of a hydrocarbon?
a. C2H6O b. C8H18 c. C6H12O6 d. CO2 e. C2H6S
Vast numbers of microorganisms are being genetically characterized without culturing them in the laboratory today through ________.
A. metagenomic sequencing B. mass spectrometry and proteomics C. column chromatography D. polymerase chain reaction
Which of the following statements about plant hormones is false?
a. They are organic compounds that act as a highly specific chemical signal. b. They are effective in extremely small amounts. c. They elicit many different responses. d. They stimulate a response at one concentration and inhibit that same response at a different concentration. e. They can be categorized into seven major classes.
A tRNA that carries a specific amino acid enters the protein-synthesizing machinery at the ribosomes and pairs with the appropriate
A) anticodon. B) codon. C) amino acid. D) charge.