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CHCS~Life Science

2017~7th~Chapter 3

TermDefinition
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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