Biology, 20.11.2020 01:00 Brightcord9679
The cell membrane performs several important functions in addition to separating the cytoplasm from the outside environment. It controls which molecules enter and leave the cell. The cell membrane is “selectively permeable,” which means it allows certain substances through and not others. One way that substances enter and leave the cell is through diffusion, the movement of particles from higher concentration to lower concentration. For example, if the concentration of salt molecules is higher inside the cell than outside, salt particles will move out of the cell. Diffusion is a type of passive transport, a movement of particles that does not require energy to occur. Facilitated diffusion is a kind of passive transport where proteins in the cell membrane help particles move from high to low concentration. The cell membrane functions most like a?
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Biology, 22.06.2019 02:30, hey840
Plz ! having a smooth seeds is the dominant trait. having wrinkled seeds is a recessive trait. the offspring of two plants with smooth seeds, a. must have smooth seeds. b. may have smooth or wrinkled seeds. c. must have wrinkled seeds. d. have a 25% change of having smooth seeds.
Answers: 1
Biology, 22.06.2019 02:30, soliseric879
Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?
Answers: 1
Biology, 22.06.2019 02:30, arelyhuerta
Contrast how pollination is different among gymnosperms and angiosperms.
Answers: 3
The cell membrane performs several important functions in addition to separating the cytoplasm from...
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