Which of the following does not require the sun’s energy?
question 9 options:
th...
Biology, 15.11.2019 21:31 JayHtx9529
Which of the following does not require the sun’s energy?
question 9 options:
the production of gasoline
photosynthesis
keeping warm in cold climates
all of the above require the sun’s energy.
Answers: 2
Biology, 22.06.2019 09:10
Hormones are chemical molecules produced by endocrine glands. one such endocrine gland is the thyroid gland, which synthesizes the thyroid hormone, which in turn affects the heart muscles. which two statements describe the probable reason for the function of the hormone? the cells in the heart have specific receptors that allow for the intake of hormones. the heart and the endocrine glands have the exact same types of cells. all cells make the same types of hormones. thyroid hormones show their effect on the heart by means of specialized cells. thyroid cells and cardiac cells have different dna.
Answers: 1
Biology, 23.06.2019 07:30
1. in the wild, male house finches (carpodus mexicanus) vary considerably in the amount of red pigmentation in their head and throat feathers, with colors ranging from pale yellow to bright red. these colors come from carotenoid pigments that are found in the birds' diets; no vertebrates are known to synthesize carotenoid pigments. thus, the brighter red the male's feathers are, the more successful he has been at acquiring the red carotenoid pigment by his food-gathering efforts (all other factors being equal). during breeding season, one should expect female house finches to prefer to mate with males with the brightest red feathers. which of the following is true of this situation? a. alleles that promote more efficient acquisition of carotenoid-containing foods by males should increase over the course of generations.b. alleles that promote more effective deposition of carotenoid pigments in the feathers of males should increase over the course of generations.c. there should be directional selection for bright red feathers in males.d. three of the statements are correct. e) two of the statements are correct.
Answers: 3
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