The Pacinian corpuscle is used in detecting
a. sound.
b. pressure.
c. chemicals.
d. sight.
e. chemical differences.
Answer: b
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A genetic disease that causes death in infancy and has an autosomal recessive inheritance pattern can persist in a population because: Check all that apply.
_____ it can be passed on to the next generation by a heterozygous carrier. _____ if both parents are carriers, they have a 50% chance of having normal children. _____ only homozygotes for the abnormal allele will have the disease. _____ individuals with one abnormal allele do not show symptoms of the disease.
A true-breeding, purple-flowered pea plant is repeatedly mated with a true-breeding, white-flowered pea plant. All of their offspring are purple-flowered. If two of these purple-flowered offspring are mated, what percentage of their offspring will be white-flowered?
A. 25% B. 50% C. 75% D. 100%
How is an antiseptic different from a disinfectant?
An antiseptic kills or inactivates all microbial forms but a disinfectant does not destroy endospores. An antiseptic is used to remove or kill microorganisms on tissue, whereas a disinfectant is used to remove or kill microorganisms on inanimate objects. An antiseptic is used to remove or kill microorganisms IN the body, whereas a disinfectant is used to remove or kill microorganisms on the body surfaces. There is essentially no difference and these terms can be used interchangeably.
An ordinal variable is one that contains categories that:
A. have an obvious ordering, and the difference in values is meaningful. B. do not have an obvious ordering. C. have an obvious order, but the difference in values is not meaningful. D. None of the answers is correct.