Which drug, if taken during pregnancy, results in infants with severely deformed arms and legs?
a. tetracycline
b. thalidomide
c. streptomycin
d. salicylic acid
e. codeine
ANSWER: b
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A candle jar is used to cultivate which type of bacteria?
a. Aerobes b. Anaerobes c. Capnophiles d. Microaerophiles
The major cause of the loss in Earth's biodiversity is
a. agricultural runoff. b. habitat loss. c. overfishing and water pollution. d. pollution. e. fossil fuel usage.
__________ are one of the few eukaryotic cells that can function without nuclei
a. Sieve tube elements b. Companion cells c. Tracheids d. Sclereids e. Vessel elements
Which best describes how these nucleotides are used during DNA replication?
A) They are joined to form proteins. B) They proofread the DNA to prevent errors. C) They are added to growing DNA strands following base-pairing rules. D) They are enzymes that break the hydrogen bonds, allowing the DNA molecule to unzip