Which of the following has a pH closest to that of human blood?
a. beer
b. coffee
c. rain water
d. sea water
e. oven cleaner
D
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Gram-positive bacteria have ____ and appear ____ under the microscope after Gram staining
a. thick cell walls; pink b. thick cell walls; purple c. thin cell walls; pink d. thin cell walls; purple e. thin cell walls; blue
What discovery by T. H. Morgan finally determined that genes were carried on chromosomes?
A. the finding of complete dominance B. discovery of the Rh blood group C. sex-linked inheritance of eye color in fruit flies D. heat-sensitivity of certain enzymes determining coat color
The PCR method was developed by
A. Mullis. B. Sanger. C. Cohen. D. Boyer.
When comparing specialist species with generalist species, it may be said that
a. generalist species will survive in fewer habitats than specialist species. b. generalist species are at a disadvantage when comparing niches. c. generalist species will most likely be at an advantage when it comes to adaptation in situations where the environment is changing. d. specialist species have a more diverse nutritional source list. e. specialist species exhibit a broad range of habitats.