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Vocab Crossword

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Across
1.group of organs that work together to perform specific function
6.pressure that must be applied to prevent osmotic movement across a selectively permeable membrane
8.the center of the atom which contains the protons and neutrons
9.basic unit of all forms of life
10.water channel protein in a cell
13.flexible double layered sheet that makes up the cell membrane and forms a barrier between the cell and its surroundings
14.process of diffusion in which molecules pass through cell membrane channels
15.when comparing two solutions, the solution with the greater concentration of solutes
19.fundamental concept of biology that states all living things are composed of cells
21.diffusion of water through a selectively permeable membrane
22.unicellular organism that lacks a nucleus
23.cell organelle consisting of RNA and protein found throughout the cytoplasm in a cell
Down
2.internal membrane system found in eukaryotic cells
3.relatively constant internal physical and chemical conditions that organisms maintain
4.a group of similar cells that perform a particular function
5.thin, flexible barrier that surrounds all cells
7.: Property of biological membrane that allows some substances to pass across it while others cannot
11.cell organelle that converts the chemical energy stored in food into compounds that are more convenient for the cell to use
12.process by which particles tend to move from an area where they are more concentrated to an area where they are less concentrated
16.when the concentration of two solutions is the same
17.a group of tissue that work together to perform closely related functions
18.on or in a cell, a specific protein whose shape fits that of a specific molecular messenger, such as a hormone
20.organisms whose cells contain a nucleus

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