Transport across biological membranes is speeded by what class of biological molecules?
a. Carbohydrates
b. Lipids
c. Nucleic acids
d. Proteins
Ans: d. Proteins
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Cardiac output =
A. heart rate × stroke volume. B. heart rate / stroke volume. C. stroke volume / heart rate. D. heart rate + stroke volume. E. stroke volume – heart rate.
A bell-shaped curve of phenotypic variation is
indicative of a. incomplete dominance. b. continuous variation. c. multiple alleles. d. epistasis. e. environmental variables on phenotypes
Independent assortment means that _____
A. monohybrid crosses will show segregation and independent assortment B. the segregation of one gene pair depends on the segregation of another gene pair C. the gametes produced must be heterozygous in all cases D. the segregation of one gene pair occurs as if no other gene pair was present E. the phenotypic ratio in F2 will be the same for dihybrid and monohybrid crosses
Describe the physical processes that result in the summer and winter stratification in temperate zone
lakes. What causes the mixing in the spring and fall? What are major consequences of the winter stratification on the biota of the lake? What will be an ideal response?