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Sufficient
Sufficient means: enough to meet the needs of a situation or a proposed end.
Expert answered|mrencyclopedia|Points 3753|
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Asked 5/3/2010 10:13:08 AM
Updated 10/16/2024 3:49:07 AM
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Edited by yumdrea [10/16/2024 3:49:06 AM]
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Active
Weegy: Active Transport - When cells must move materials in an opposite direction - against a concentration gradient. (More)
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Updated 10/19/2014 5:08:22 PM
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Active: doing things that require physical movement and energy.
Added 10/19/2014 5:03:42 PM
This answer has been confirmed as correct and helpful.
Confirmed by yumdrea [10/19/2014 5:08:21 PM]
Membrane
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Updated 10/19/2014 2:01:18 PM
2 Answers/Comments
membrane n.
1.Biology.
a.A thin, pliable layer of tissue covering surfaces or separating or connecting regions, structures, or organs of an animal or a plant.
b.Cell membrane.
2.A piece of parchment.
3.Chemistry. A thin sheet of natural or synthetic material that is permeable to substances in solution.
Added 5/3/2010 11:11:12 AM
A membrane is a selective barrier at times it is also a outer covering of cell or cell organell that allows the passage of certain constituents and retains other constituents found in the liquid.
Added 10/19/2014 1:46:26 PM
This answer has been confirmed as correct and helpful.
Confirmed by yumdrea [10/19/2014 2:01:12 PM]
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