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.
B. they inherited the alleles that made them resistant.
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The mechanoreceptors that detect the stretch of tendons and relaxation of muscles are known as
a) proprioceptors b) chemoreceptors c) nociceptors d) thermoreceptors
You work for a company that manufactures food products. A new "wonder food" is being distributed by a rival company. The researchers in your company determine that the "wonder food" contains only carbon, oxygen, and hydrogen. At this point, your
researchers can say with certainty that the food A) includes proteins. B) could only be made of triglycerides. C) could only be made of carbohydrates. D) does not include proteins or nucleic acids.
The plasma membrane is ______ permeable
Fill in the blank(s) with the appropriate word(s).
Is it likely that the increase in antibiotic-resistant organisms is related to the increase in hand washing in healthcare facilities?
A. Yes, because the microbiota embedded in the skin oils of the healthcare workers are being killed off and replaced by resistant organisms. B. No, because the increase in antibiotic-resistant organisms is a result of exposure to antibiotics, not alcohol. C. No, because the handwashing prevents organisms from becoming antibiotic-resistant. D. Yes, because the organisms are developing resistance to the alcohol and therefore antibiotics also.