Which of the following is true about polio?
a. it is an X-linked genetic disease
b. it has been virtually eliminated worldwide
c. it is a disease that kills motor neurons
d. it most frequently affects adults
e. all of these are true about polio
C
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Could an isolated melanin granule move along an actin microfilament?
A. Yes, melanin granules have motor proteins. B. Yes, motor proteins all use ATP to cause a conformation change. C. No, motor proteins are specific for the type of filament they bind. D. Answers a and b are both correct.
Which of these processes is a reversal of the progression of the other three?
a. ingestion b. peristalsis c. emesis d. elimination
Insects use ____ as a respiratory system
a. integument exchange b. lungs c. tracheal exchange d. gills e. none of these
An allele that appears more frequently in males is most likely
a. dominant. b. nonhomologous. c. homologous d. sex-linked