Which enzyme catalyzes the reaction: H2O2 + 2H+ ? 2H2O?
A) catalase
B) oxidase
C) peroxidase
D) superoxide dismutase
C
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The presence of a group of antigens that determine blood type is an example of a(n) ____________
A. semilethal allele B. sex-linked trait C. multiple allele system D. incomplete dominance
The phylogenetic species concept looks at both the
a. environmental adaptations and morphology. b. genetic data and environmental adaptations. c. morphology and environmental adaptations. d. morphology and genetic data. e. species response to adverse conditions and genetic data.
Mexican hairless dogs are heterozygous (Hh), carrying a single copy of the recessive lethal allele. In a given population, the Hh genotypic frequency is 60% and the frequency of each homozygote is 20%
Assuming w = 1 for the Hh and hh dogs, what is the estimated genotypic frequency of the lethal HH genotype after reproduction? A) 20% B) 14% C) 10% D) 39% E) 46%
________________halophiles require at least a 9% salt concentration in order to grow, whereas ______________ halophiles can adapt to a wide range of solute concentrations.
A) Facultative; obligate B) Osmotolerant; obligate C) Obligate; facultative D) Osmotolerant; facultative E) Facultative; osmotolerant