Which of the following is not an example of artificial selection?
A. different varieties of roses; yellow, pink, red, thornless, climbing, etc.
B. different breeds of cats; Siamese, Persian, Himalayan, American shorthair, etc.
C. different types of tomatoes; roma, beefsteak, grape, cherry, etc.
D. different styles of potatoes; fried, mashed, baked, etc.
E. different breeds of dogs; poodle, basset hound, Chihuahua, Great Dane, etc.
Answer: D. different styles of potatoes; fried, mashed, baked, etc.
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a. pelvic girdle b. radius c. sternum d. ulna
From the outside of a tree to its center, which
of the following is the correct order of appearance? 1. periderm 2. vascular cambium 3. sapwood 4. seconary phloem 5. cork cambium 6. heartwood
a. 1-2-4-5-6-3 b. 1-5-4-2-3-6 c. 1-4-5-2-6-3 d. 1-3-2-5-4-6 e. 1-2-4-5-3-6
A broad-sense heritability of 0.8 for a particular trait indicates that
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During the signal transduction process, the signal often triggers a signal transduction cascade. For example, an activated receptor activates hundreds of protein A. Each activated protein A activates hundreds of protein B and so on until a cellular response occurs. What purpose does this cascade serve?
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