Which of these statements is true?
a. Environment can readily alter some genotypes.
b. Genotype is manifested in phenotype.
c. Genetic variation is easier seen than phenotypic
variation.
d. Variation dies with individuals.
e. Phenotype is seen physically in the genotype.
Answer: b
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Indirect selection
A. is necessary to isolate auxotrophic mutants. B. uses media on which the mutant but not the parental cell type will grow. C. uses media that reverses the mutation. D. uses media upon which neither the parental cell typeor mutant grows. E. is necessary to isolate auxotrophic mutants AND uses media upon which neither the parental cell typeor mutant grows.
Grana are
a. the same as starch grains. b. the site of ATP production within chloroplasts. c. part of the outer chloroplast membrane. d. contained within mitochondria and nuclei.
Microbes are not likely to be found in which of the following locations on human skin?
A. The stratum corneum B. Sebaceous gland C. Hair follicle D. Sensory nerve fiber in the dermis
Compared to the vital capacity, how much air can lungs actually hold?
A) always less B) sometimes less C) always more D) sometimes more