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Malari Biology Unit2

Biology Unit 2 review

QuestionAnswer
What are the three parts of the cell theory? All living things are composed of cells, cells are the basic building blocks of all living things, and new cells are made from existing cells.
What is the difference between a prokaryote and an eukaryote? A prokaryote is a smaller cell, is less complex, and does not have a nucleus. It is classified as bacteria. An eukaryote is a larger, more complex cell, with a nucleus.
What is osmosis? The diffusion of water through a selectively permeable membrane.
What is diffusion? Particles moving from a highly concentrated area to a less concentrated area. (no energy is used)
What is active transport? The moving of particles from a less concentrated area to a highly concentrated area. (energy is used)
What is a hypo-tonic solution? When the solution is less concentrated than the cell
What is a hyper-tonic solution? When the solution is more concentrated than the cell.
What is an isotonic solution? When the solution and the cell have the same concentration.
What is a permeable membrane? A membrane that can be passed through
What happens in a hyper-tonic solution permeable to water? The cells shrink and dry up.
What happens in a hypo-tonic solution permeable to water? The cells swell.
Created by: mr20115
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