Active transport requires energy to transfer material in and out of the cell.
Passive transport is automatic and does not require energy.
Examples of Active: Endocytosis and Exocytosis.
Examples of Passive: Facilitated Diffusion, Simple Diffusion, and Osmosis.
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It is called vasectomy reversal. During the vasectomy, the doctor will cut and block the tubes in a process known as vas deferens. But in vasectomy reversal, the doctor joins these tubes together to allow the sperm to reach the semen that is ejaculated during orgasm.
Stem cells can give rise to specialized cells. When unspecialized stem cells give rise to specialized cells, the process is called differentiation. While differentiating, the cell usually goes through several stages, becoming more specialized at each step. Scientists are just beginning to understand the signals inside and outside cells that trigger each step of the differentiation process.
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I believe the answer is B. Osmosis is the diffusion of water: so it would be the movement of molecules from high concentration to low. Therefore it is not A and B is the only one relating to water.
flamingos get there pink color because the food they eat is pink