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Explain why crossing-over is an important source of genetic variation. written response
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Tlymphocytes mature in the? a. thyroid gland. b. bone marrow. c. spleen. d. thymus.
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Guard cells control which event? the growth of plants capture of solar energy gas exchange in leaves water absorption in roots
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According to the cell theory, which describes cells? a. all organisms are composed of multiple cells. b. all cells have the same structure and function. c. cells are found in everything on earth. d. living organisms are not created spontaneously
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Biology, 22.06.2019 09:30
Drag each tile to the correct box. the body monitors the levels of oxygen in the blood to regulate breathing. isabel is running in a marathon and is near the finish line. she feels out of breath. how will her nervous system work to generate a reaction? arrange the tiles in chronological order. isabel's breathing rate increases. sensory receptors in the arteries detect low oxygen levels. the brain sends signals through motor neurons. sensory neurons generate an impulse. the central nervous system relays an impulse to certain brain regions.
Answers: 1
Explain why crossing-over is an important source of genetic variation. written response...
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