Osmosis is the diffusion of water molecules across a selectively permeable membrane from an area of higher concentration to an area of lower concentration. The gradient is steep enough that potassium ions will move out of the cell (via channels), despite a growing negative charge on the interior. ", Biologydictionary.net Editors. Remember that there is water outside the cell, and the cytoplasm inside the cell is mostly water as well. Both domesticated plants and animals spread across the globe through contagious diffusion in early years by farmers and traders, and later by relocation diffusion through European exploration and colonialism. What assists the movement of substances by facilitated diffusion? QUESTION 28 Which of the following best explains the role of transcription in a cell? Small-scale farmers in Asia often lacked the resources necessary to acquire the hybrid . The reaction proceeds towards completion at a faster rate. The electrode system developed a potential of 0.2331V-0.2331 \mathrm{~V}0.2331V when immersed in 10.010.010.0 mL\mathrm{mL}mL of the solution of unknown concentration. Wheat was first domesticated in Mesopotamia because of a favorable climate and a great diversity of wild grains that led to crossbreeding of seeds. Which of the following best explains diffusion? Which of the following best describes the survey methods used to delineate agricultural land and the associated settlement patterns shown in the tw. Secondary active transport involves the movement of a substance into a cell through a protein channel with its concentration gradient. If you're seeing this message, it means we're having trouble loading external resources on our website. The rate of this movement depends on the energy of the molecules. (2009). Which of the following best explains the economic advantage of the type of farm-produced goods shown in the images? This can even be observed visually by the addition of different colored dyes to each of the liquids. What part of the plasma membrane is hydrophobic? 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