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section 1 chapter 2
| word | definition |
|---|---|
| organisms | living things |
| cell | the basic unit of structure and function in an organism |
| unicellular | single celled organisms |
| multicellular | organisms are composted of many cells that are specialized to do certain tasks |
| stimulus | a change in an organisms surrounding that causes the organism to react |
| response | an action or change in behavior |
| development | the process of change that occurs during an organisms life to reproduce a more complex organisms |
| spontaneous generation | the idea that living things can arise from nonliving sources. |
| autotrophs | organisms that can maker their own food |
| heterotrophs | organisms that cannot make their own food |
| homeostasis | the maintenance of stable internal conditions |
| classification | the process of grouping things based on their similarities |
| taxonomy | the scientific study of how living things ar classified |
| binomial nomenclature | giving each organism a unique two part name. |
| species | a group of similar organisms that can mate with each other and produce offspring that can also mate and produce |
| genus | the first word in an organism's scientific name. |
| prokaryotes | organisms whose cells lack a nucleus |
| nucleus | a dense area in a cell that contains nucleus a nucleic acids |
| eukaryotes | organisms with cells that contain nuclei |
| cells | the basic units of structure and function in living things. |
| microscope | an instrument that makes small objects look larger |
| cell theory | a widely accepted explanation of the relationship between cells and living things |
| organelles | structures within the cell with different functions |
| cell membrane | covers the cell and lets in material and holds parts of the cell together |
| cytoplasm | a jelly like substance to keep cells working properly |
| mitrchondria | breaks down food and releases the energy that it gets from the food |
| vacuole | provides storage for food, water, and wastes |
| chloroplast (only in a plant cell) | make up the food factory, contain chlorophyll and use the sun's energy to make food |
| cell wall (only in a plant cell) | rigid layer that supports the plant |
| ribosomes | they function as factories to produce proteins |
| endoplasmic reticulum | a passageway that carries proteins and other materials from one part of the cell to another |
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catherine6900
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