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CHCS~Life Science
2017~7th~Chapter 3
| Term | Definition |
|---|---|
| organism | a complete living thing |
| cell | the tiny, living, structural, and functional unit of all living things |
| cytoplasm | all the material, except for the nucleus, inside a cell |
| unicellular organism | a living thing composed entirely of one cell |
| multicellular organism | a living thing that is composed of more than one cell |
| tissue | a group of similar cells that together perform a special function |
| colonial organism | a living thing that is composed of a group of similar cells living together |
| energy | the ability to do work |
| physical life | a characteristic produced when organized systems of non-living substances use energy |
| spiritual life | man's relationship with God |
| cell theory | the theory that all living things are mad up of microscopic units called cells |
| 3 points of the cell theory | All cells come from preexisting cells, All living things are made of cells and the product of cells, The functions of living things are preformed by the cells they are made from |
| molecule | the smallest unit existing as a particular substance |
| carbohydrate | a substance that contains only carbon, hydrogen, and oxygen |
| protein | a substance made of long chains of amino acids |
| nucleic acid | a molecule that contains the genetic information of a cell (DNA & RNA) |
| lipid | a substance such as fat or oil |
| 5 characteristics of living things | they...have life spans, can reproduce, grow, are made of cells, require energy |
| 2 ways organisms might obtain energy | turns food into energy, gathers sunlight |
| 4 basic functions of all living cells | cells... use energy, manufacture materials, respond to their environment, reproduce themselves |
| 4 categories of molecules found in cells | carbohydrates, proteins, nucleic acids, lipids |
| 1 function of protein in a cell | life-supporting process |
| 2 major types of nucleic acids | DNA, RNA |
| Why do organisms need energy to live? | they would die |
| Why do all living things need amino acids? | it is necessary for a protein molecule |
| Why are enzymes important to living things? | help change substance with out being permanently changed |
| Are all fats harmful? | no, you need them for membranes |
Created by:
pigsrule150
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