One of the main problems with growing Bt cotton and other Bt-enhanced crops is the Bt toxin:
A) can produce populations of insects resistant to it.
B) can be harmful to humans.
C) can create Bt refuges near the fields that harbor bugs not resistant to Bt.
D) reduces the need for insecticides.
Answer: A
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If ancestral humans did not develop an opposable thumb, grasping fingers, and binocular vision, how might their history have differed?
A. They would have been less able to occupy the trees. B. They would have been unable to develop spoken language. C. They would have been less able to walk upright. D. They would have been unable to survive without changing their diet.
People who do not exhibit changes in blood pressure based on a circadian rhythm are more likely to have a heart
attack.
Indicate whether the statement is true or false.The first class of drugs developed to treat AIDS, such as AZT, were known as reverse transcriptase inhibitors. They worked because they _____
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The ________ is the entire interwoven mass of one multicellular fungal organism.
A. hyphae B. sporangium C. mycelium D. pseudoplasmodium E. conidiophore