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ReedCells
Ch. 4 and 5
| Question | Answer |
|---|---|
| What is the smallest unit that can perform all life processes | cell |
| What is anything that causes a reaction or change in an organism or any part of an organism | stimulus |
| the maintenance of a constant internal state in a changing enviroment | homeostasis |
| sexual reproduction | reproduction in which the sex cells from two parent organisms unite, producing offspring that share traits from both parents |
| asexual reproduction | reproduction that does not involve the union of sex cells and i whuch one parent produces ooffspring identical to itself |
| What is the passing of genetic traits fom parent to offspring | heredity |
| metabolism | the sum of all chemical processes that occur in an organism |
| producer | an organism that can make its own food by using the energy from its surroundings |
| consumer | an organism that eats other organisms or organic matter |
| decomposer | an organism that gets energy by breaking down the remains of dead organisms or animal wastes and consuming or absorbing the nutrients |
| proteins | molecule that is made up of amino acids and h is need to build and reapair body structres and to regulate processes in the body |
| carbohydrate | class of energy giving nutrients that includes sugars, starches and fiber; contains carbon, hydrogen and oxygen |
| lipid | type of biochemical that does not dissolve in water; fats and oils are lipids |
| phospholipid | lipid that contains phosphorus and that is a structural component in cell membranes |
| ATP | molecule that acts as the main energy source for cell processes |
| nucleic acid | a molecule made up of subunits called nucleotides |
| True or False: All living things are made up of cells | True |
| Organisms must have food because | food is a source of energy |
| Organisms strore energy in | lipids |
| The subunits of nucleic acids are | nucleotides |
| The sub units of proteins are | amino acids |
| proteins that start or speed up chemical reactions in cells are | enzymes |
| Why do all living things need air? | Becuase the need the gases in the air to perform chemical processesthat realease energy from food. |
| What covers a cell? | a membrane |
| What does a cell contain? | All materials necessary for life |
| Why does an organism have to maintain stable internal conditions? | because if they dont they will die |
| When you shiver or sweat your body is | trying to maintain a stable internal condition |
| Most single cell organisms reproduce thorugh | asexual reproduction |
| Most animal and plants reproduce through | sexual reproduction |
| What does DNA do? | controls and structure and function of cells |
| What do organisms pass on to their offspring? | copies of their DNA |
| How does a single celled organism grow? | it grows by getting larger then it divides |
| In addition to getting larger, living things also | develope and change |
| What are four basic needs of every organism? | water, air, a place to live and food |
| Cells of most living things are made of approximatelly, how much water? | 70% |
| Most chemical reactions involved in metabolism require | water |
| About how long can a human survive without water? | 3 days |
| Air is a mixture of gases including, oxygen and | carbon dioxide |
| What is a chemical process in which most living thing require oxygen? | releasing energy from food |
| Green organisms convert energy from sunlight to energy stored in food during | photosynthesis |
| What do organisms need in the place where they live? | All the things they need to survive |
| What are 2 things food gives organisms? | energy and raw materials need to carry on life processes |
| 2 ways organisms use nutrients from food are | to replace cells and build body parts |
| nutrients are made up of | molecules |
| molecules made up of different kind of atoms are | compounds |
| cells use carbohydrates as | a source of energy and for energy storage |
| carbohydrates made of one sugar molecule or a few linked sugar molecules are called | simple carbohydrates |
| a carbohhydarte made of hundreds of molecules linked together are | complex carbohydrates |
Created by:
areed1
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