Carriers of the sickle-cell allele have a genetic advantage because they have ____
a. lower blood pressure
b. the ability to carry more oxygen in their blood
c. increased resistance to malaria
d. hyperactive immune systems
e. extra red blood cells
ANSWER: c
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Cholesterol functions in the plasma membrane to
A. transport ions. B. serve as an energy molecule. C. maintain fluidity. D. mediate steroid action. E. maintain hypertension.
Assuming complete dominance, a 3:1 phenotypic ratio is expected from a monohybrid sib or self-cross
Indicate whether the statement is true or false
Describe the climate, soil, and representative organisms for two of the following terrestrial biomes:savanna
, temperate rain forest, chaparral, or taiga. What will be an ideal response?
Griffith, a British microbiologist, used bacteria and mice to demonstrate the process of transformation. During transformation,
A. genetic material is transferred from one bacterial cell to another. B. a bacterial chromosome produces an exact copy of itself. C. the nucleus of a mouse cell repairs itself when damaged by bacterial infection. D. a bacterial cell is transformed into a spore during unsuitable environmental conditions. E. DNA from an infected mouse cell changes bacteria from a nonpathogenic to a pathogenic form.