In contrast to alpha radiation, beta radiation:
A) is easily stopped by a piece of paper.
B) travels slowly and is less penetrating.
C) can easily penetrate the human body.
D) requires a layer of clothing to stop it.
Answer: D) requires a layer of clothing to stop it.
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Which one of these mollusk groups can be classified as suspension feeders?
A) bivalves B) gastropods C) chitons D) cephalopods
True or false: The benefit of asymmetric meiotic division during oogenesis is that it allows most of the cytoplasm to be retained in a single cell
A. true B. false
One of the ways in which the smooth muscle contractions of the digestive tract are controlled is by
A. mass movements. B. the nervous system. C. propulsion. D. peristalsis. E. chyme secretion.
Proteins consist of
a. monosaccharides linked in chains. b. amino acid units. c. polysaccharide units. d. condensed fatty acids.