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Biology, 21.06.2019 21:00
Epinephrine is a hormone released from the adrenal gland of the body, most often in a stressful situation. it is known as the "fight-or-flight" hormone. one way that it causes a response in the body is to activate receptors on muscle cells. where are these cellular receptors located? a. on the cell membrane b. in the nucleus c. on the cell wall d. around the mitochondria
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Biology, 22.06.2019 22:30
Which of the following correctly matches an immune system cell with the defense it produces? a. b cells release cytotoxins. b. t cells release cytotoxins. c. b cells absorb antibodies. d. t cells absorb antibodies.
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Biology, 23.06.2019 06:00
10. how is it that a code consisting of only four letters (a, t, g, c) can contain instructions for all the different parts of an organism and account for the diversity of organisms on this planet?
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Where did artificial selection carried out?...
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