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Biology Vocab

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Across
1.Denoting or relating to a solution having the same osmotic pressure as some other solution, esp. one in a cell or a body fluid.
3.A pliable sheetlike structure acting as a boundary, lining, or partition in an organism.
8.An organelle found in large numbers in most cells, in which the biochemical processes of respiration and energy production occur.
13.A microscopic hairlike process extending from the surface of a cell or unicellular organism.
16.transport of a substance across a cell membrane by diffusion; expenditure of energy is not required.
18.The double-layered membrane that envelopes the nucleus of a eukaryotic cell, separating the contents of the nucleus from the cytoplasm.
19.An organism consisting of a cell or cells in which the genetic material is DNA in the form of chromosomes is contained.
20.A minute particle consisting of RNA and associated proteins, found in large numbers in the cytoplasm of living cells.
21.A small dense spherical structure in the nucleus of a cell during interphase.
Down
2.A plastid that contains chlorophyll and in which photosynthesis takes place.
4.A membrane network within the cytoplasm of cells involved in the synthesis, modification, and transport of cellular materials.
5.Any of a group of organic compounds, including the fats, oils, waxes, sterols, and triglycerides.
6.The tendency toward a relatively stable equilibrium between interdependent elements, esp. as maintained by physiological processes.
7.A microscopic network of protein filaments and tubules in the cytoplasm of many living cells, giving them shape and coherence.
9.The ingestion of bacteria or other material by phagocytes and ameboid protozoans.
10.A process by which the contents of a cell vacuole are released to the exterior through fusion of the vacuole membrane.
11.The movement of ions or molecules across a cell membrane into a region of higher concentration, assisted by enzymes and requiring energy.
12.A microscopic tubular structure present in numbers in the cytoplasm of cells, sometimes aggregating to form more complex structures.
14.Net movement of molecules in and out of the cell across the cell membrane along a concentration gradient.
15.Having a lower osmotic pressure than a particular fluid, typically a body fluid or intracellular fluid.
16.A group of organisms whose cells lack a membrane-bound nucleus.
17.A transport medium for delivering nutrients to the cells of the various organs of the body and for transporting waste.

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