Two kinds of mice live in the same area but one is black and the other is brown. The answer to which of the following questions would be most valuable in determining if they are of the same species.
A. Do members of the two kinds mate with one another and have offspring that reproduce?
B. Do the two kinds have other physical differences other than color?
C. Are the brown mice eaten more often by owls than black mice?
D. Do the brown mice climb trees more often than black mice?
A. Do members of the two kinds mate with one another and have offspring that reproduce?
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Which one of the following is not found in a bacterial nucleoid?
A. proteins B. supercoiled DNA C. enzymes D. histones E. All of the answer options are found in a bacterial nucleoid.
A striking feature of Clostridium tetani that differentiates it from other pathogenic species of Clostridium is its ability to
A. produce a greenish pigment. B. form spores. C. form terminally located, spherical spores. D. grow aerobically
What is the average amount of trash produced per person per day in the United States?
a. 1.4 pounds b. 3.3 pounds c. 6.8 pounds d. 4.6 pounds e. 2.1 pounds
When a farmer grows cotton containing the gene for Bt toxin, insects that are resistant (rr) survive and reproduce. These insects were resistant because
A. the insecticide caused mutations to generate resistant alleles. B. they inherited the alleles that made them resistant. C. the insects wanted to survive the insecticide and mutated their DNA. D. by random chance some insects did not die from the insecticide. E. the insects were able to produce gametes that were resistant to the insecticide.