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ch. 2 lucas ripa
characteristics of living things and necessities of life
| Question | Answer |
|---|---|
| anything that causes a reaction or change in an organism or any part of an organism | stimulus |
| the maintenance of a constant state in a change internal state in a changing environment | homeostasis |
| smallest unit that can perform; covered by a membrane and have DNA and ctoplasm | cell |
| what are the characteristics of living things | made up of cells, sence and respond to chage, reproduce, use energy, grow and delevop |
| reproduction in which sex cells from two parents unite, producing offspring that share traits from both parents | sexual reproduction |
| reproduction that does not involve the union of sex cells and in which one parent produces offspring identical to itself | asexual reproduction |
| the passing of gentic trait from parent to offspring | heredity |
| the sum of all chemical processes that occur in an organism | metabolism |
| how do our cells differ from single celled organism? | organisms that made up of one cellperform celluar functions. multiple celled organism's cells have special functions |
| what is the difference between growth and development | growth involves a change in size. development is a change in form |
| what is DNA | traits from parents that can be passed down, heredity.p |
| an organism that can make its own food by using energy from its surroundings | producer |
| an organism that eats other organisms or organic matter | consumer |
| an organism that gets energy by breaking down the remains of dead organism or animal waste and consuming or absorbing the nutrients | decomposer |
| what are the necissities of life | water, air, food, a place to live |
| what are the 6 elements key to life | carbon, hydrogen, nitrogen, oxygen, phosphorous, sulfur |
| what percent of your body is water | 70% |
| air is a mixture of ..... | oxygen and carbon dioxide |
| why is place to live important | contians all of the thing they need to survive |
| molecule that is made up of amino acids and that is needed to biuld and repair body parts | protein |
| start or speed up chemical reaction in cells | enzymes |
| deliver and release oxygen throughout the body | hemoglobin |
| a class of energy giving nutrients that includes sugars | carbohydrate |
| made up of one sugar molecule or a few sugar molecules linked together. ex. table sugar fuits | simple carbohydrates |
| hundreds of sugar molecules linked together.ex mashed potatoes, starches | complex carbohydrates |
| compounds that cannot mix with water | lipids |
| lipid that contains phoshorus and that is a structual component in cell membranes | phosholipids |
| what is the differences between fats and oils | fats are solid at room temp. and are in animals, oils are liquid at room temp. and are found on plants |
| what is a ATP | a major energy-carrying molecule in the cell. the energy in carbohydrates and lipids must be transferred at ATP, which then provides fuel for cellular activites |
| a molecule made up of ubunits called nucleotides | nucleic acid |
Created by:
lripa
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