Nuclear pores permit the passage of all the following except:
A. RNA only outward.
B. proteins inward and outward.
C. DNA molecules only outward.
C. DNA molecules only outward.
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Exposure to a teratogen during pregnancy can result in ____
a. decreased risk of miscarriage b. newborns of higher birth weight c. reduced vitamin C levels for the mother-to-be and for her fetus d. fetal facial and cranial deformities e. increased risk of rubella
The term "ecological succession" refers to
A. the flow of energy from producers to consumers. B. replacement of one plant community by another. C. successive seasons of the year that guide the growth of ecosystems. D. an unending series of geological events that occur in all areas.
What cellular process is involved in the production of milk-specific mRNA molecules?
A. Protein synthesis B. Digestion C. Lipid synthesis D. Cellular respiration
Which statement best describes h2 (narrow-sense heritability)?
A) It measures the contribution genotypic variance to total phenotypic variance. B) The deviation from additive components when they behave epistatically. C) The proportion of phenotypic variance due to additive genotypic variance alone. D) The genotypic variance due to additive action of various QTLs.