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Biology-unit 2
living organisims
| Question | Answer |
|---|---|
| living things grow by the prosses of | mitoses |
| living things make sex cells by | meiosis |
| change of living things over time | evolution |
| looks alike and can breed together | species |
| a traite that helps individuals survive over time | natural selection |
| natural selection leads to | adaptation |
| deoxyribonucleic acid | DNA |
| all of a organisms genetic matirial | genetic |
| no energy | passive transport |
| requires energy | active transport |
| have an internal environment that is not cellular. is complex | multi-cellular |
| chemical reactions occur when | making or breaking chemical bonds |
| all reactions require | activation energy |
| enzymes are catalysts for chemical reactions in | living things |
| disruptions in homeostasis can | prevent enzymes from functioning |
| enzymes function best in | a small range of conditions |
| changes in temperature and pH can break | hydrogen bonds |
| water has a _ pH | 7 |
| an enzymes function depends on its | structure |
| structure allows only | certain reactions to bind enzymes |
| each reaction is catalyzed by a | specific enzyme |
| inhibitors can regulate enzymes by | binding together to slow a chemical reaction |
| water is a | polar molecule |
| polar molecules have | slightly changed regions |
| non polar molecules don't | have a charged region |
| hydrogen bonds are responsible for _ important properties of water | 3 |
| what are the 3 responsible properties for water | high specific heat cohesion adhesion |
| the amount of heat energy required to raise the | temperature of 1 gram of water by 1c |
| water helps moderate its climate because of its | high heat capacity |
| water has a high heat of | vaporization |
| heat must be absorbed from the | environment in contact with the water |
| a solution is formed when | one substance is dissolved into another |
| a solution is a | homogeneous mixture |
| ________ dissolve other substances | solvents |
| ________ dissolve into other solvents | solutes |
| polar solvents dissolve | other polar solutes |
| non polar solvents dissolve | other non polar solutes |
| polar substances and non polar substances generally remain | seperate |
| an acid releases a hydrogen ion when | it dissolves in water |
| water has a pH of ___ | 7 |
| living organisms maintain constant | internal conditions, including pH |
| buffers help maintain | pH |
| chemistry begins in | water |
Created by:
manu1
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