_________ can be used to disinfect water, food, and surfaces.
A) Chlorine compounds
B) Phenols
C) Alcohols
D) Hydrogen peroxide
Ans: B) Phenols
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In a population of 400 salamanders, some individuals have long toes and others have short toes. This phenotypic difference is due to a single gene with dominant and recessive alleles, T and t, where T confers long toes. If the toe length gene is in Hardy Weinberg equilibrium, and 256 individuals have short toes, how many individuals are heterozygous at the toe length locus?
A) More information is needed to determine the answer. B) 32 C) 128 D) 144
Why aren't insect tracheae associated with capillary beds?
A. Insects have an open circulatory system. B. Insects have external gills associated with hemolymph vessels. C. Insects use an air sac respiratory system. D. Insect capillaries are found only around the gut.
Compare and contrast osmoregulation of freshwater fish and marine fish. What will be an ideal response?
The figure shows the evolution of HIV and SIV. Choose the true statements about the evolution of HIV. (Select all that apply.)
A) All strains of HIV are included within clades with SIV strains.B) A strain of HIV is never more closely related to another strain of HIV than it is to a SIV strain.C) Humans acquired different subtypes of HIV from different primate hosts.D) HIV-1 group O is more closely related to SIV-chimpanzee than SIV-gorilla.E) All strains of SIV are included within clades with HIV strains.
What will be an ideal response?