According to scientific evidence, what is the best prevention method known for reducing the chance of contracting a common cold?
A) drinking Echinacea tea at least once a day
B) eating 500 mg of vitamin C a day
C) using throat lozenges that contain zinc
D) washing your hands frequently and effectively
D
Biology & Microbiology
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tRNA is released from the ribosome at the ________ site
A) P B) A C) R D) E
Biology & Microbiology
Although ferns and conifers maintained their diversity into the early Cenozoic era, ____ may have hastened their
decline in the early Cretaceous.
a. cycads b. gymnosperms c. angiosperms d. invertebrates e. mammals
Biology & Microbiology
Photoreceptors are found in the
a. lens. b. ciliary body. c. iris. d. retina.
Biology & Microbiology
According to the World Health Organization,
approximately how many children around the world show a vitamin A deficiency? a. 14 million b. 24 million c. 140 million d. 524 million e. 724 million
Biology & Microbiology