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In addition to seeds, which of the following characteristics are unique to the seed-producing plants? a) sporopollenin b) lignin present in cell walls c) pollen d) use of air currents as a dispersal agent e) megaphylls
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Biology, 22.06.2019 00:30
Ais a landform that is formed at the mouth of a river from the deposition of sediment carried by the river as the water flows.
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Biology, 22.06.2019 19:00
What is the next step in muscle contraction after the actin changes shape
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Describe surface tension in a group of bonded water molecules
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Is it considered muscle s ennervation if sympathetic fibers innervate the vessels within the muscle?...
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