Cell membranes are selectively permeable, regulating which substances can pass through, as well as how much of each substance can enter or exit at a given time. In cells, some molecules can move down their concentration gradients by crossing the phospholipid portion of the membrane directly, while others must pass through membrane proteins. Which of these statements does NOT apply to facilitated diffusion?
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Biology, 21.06.2019 17:20
Groups of organisms with low biotic potential, such as gray whales, that produce at most one offspring every other year a) are r-selected b) are k-selected c) are not subject to density-dependent limiting factors d) show the initial stages of the extinction process e) have escaped from the processes of natural selection and adaptation
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Biology, 22.06.2019 02:30
Variety of living organisms; includes genetic, species, and ecological types.
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Biology, 22.06.2019 15:00
Oak and maple trees, chipmunks, white-tail deer, and black bears emerging from hibernation are all organisms that may be found in which biome
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Biology, 22.06.2019 16:30
During photosynthesis, hydrogen ions are most directly used to in the chloroplast pictured above. a) make glucose b) make chlorophyll c) produce carbon dioxide d) drive the production of atp
Answers: 3
Cell membranes are selectively permeable, regulating which substances can pass through, as well as h...
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