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ch 2 TAUTE
| Question | Answer |
|---|---|
| what is a cell? | the smallest unit that can perform all life processes; cells are covered by a membrane and have DNA and cytoplasm |
| what is stimulus? | anything that causes a reaction or change in an organism or any part of an organism |
| what is homeostasis? | the maintenance of a constant internal state in a changing environment |
| what is sexual reproduction? | reproduction in which the sex cells from two parents unite, producing offspring that share traits from both parents. |
| what is asexual reproduction? | reproduction that does not involve the union of sex cells and in which one parent produces offspring identical to itself |
| what is heredity? | the passing of genetic traits from parent to offspring |
| what is the sum of all chemical processes that occur in an organism? | metabolism |
| a producer is ________. | an organism that ca make its own food by using energy from its surroundings |
| ______ is an organism that eats other organisms or organic matter. | consumer |
| a _____ is an organism that gets energy by breaking down the remains of dead organisms or animal wastes and consuming or absorbing the nutrients | decomposer |
| what is a protein? | a molecule that is made up of amino acids and that is needed to build and repair body structures and to regulate processes in the body |
| a ________ is a class of energy-giving nutrients that includes sugars, starches, and fiber; contains carbon, hydrogen, oxygen | carbohydrate |
| simple carbohydrates are _________. | made up of one sugar molecule or a few sugar molecules linked together. |
| what are complex carbohydrates? | they are made up of hundreds of sugar molecules linked together. |
| a lipid is what? | a type of biochemical that does not dissolve in water; fats and steroids are lipids |
| what is a lipid that contains phosphorous and that is a structural component in cell membranes? | phospholipid |
| what is adenosine triphosphate? | ATP |
| ATP is what? | a molecule that acts as the main energy source for cell processes |
| a molecule made up of subunits called nucleotides | nucleic acid |
| what percent of the body is made up of water? | 70 |
| how many days can the human body go without water? | 3 |
| what is air made up of? | it is a mixture of several different gases, including oxygen and carbon dioxide |
| how do organisms on land get there air? | through oxygen |
| what is photosynthesis? | its when green organisms convert the energy in sunlight to energy stored in food |
| what do organisms need in their place to live? | they need to live in a place that contains all of the things that they need to survive |
| why do organisms normally compete for food, water, and other necessities? | because space on earth is so limited |
| why do all living things need food? | because food gives organisms energy and the raw materials needed to carry on life processes |
| all living things grow and _____. | develop |
| what is your bodys normal temperature? | 37 degrees C |
| how does your body respond when it is hot to cool it down? | it sweats |
| how does your body warm itself up when it is cold? | by shivering |
Created by:
staute
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