If Mendel had compared traits controlled by genes on the same chromosome, his results would not have matched the predictions of his model.
a. true
b. false
Answer: a. true
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Phloem transport of sucrose is often described as going from source to sink. Which of the following is most likely to function as a source?
A) a growing leaf in early spring B) a growing root in late summer C) a bulb in early spring D) a shoot tip in late fall
Although wildfires frequently result in the destruction of large areas of habitat, they also provide opportunities for some species of pine cone-bearing trees to disperse their seeds and grow new trees. In what other way does forest life benefit from wildfires?
a. Nocturnal predators are driven away from prey. b. Forest fires provide warmth during harsh winters. c. Ashes are rich in nitrogen and other nutrients. d. Smoke protects animals from harmful UV rays.
Explain why the process in the kidneys is called "filtration." (What is acting as a "filter"?)
What will be an ideal response?
Transgenic plants have been modified for all of the following characteristics except:
A) nitrogen fixation. B) herbicide resistance. C) insect resistance. D) improved nutritional quality. E) reduced cost of production.