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ShieldsCells
Characteristics of living things and the necessities of life
| Question | Answer |
|---|---|
| the maintenance of a constant internal state in a changing environment | homeostasis |
| anything that causes a reaction or change in an organism or any part of an organism | stimulus |
| reproduction in which the sex cells form two parents unite, producing offspring that share traits from both parents | sexual reproduction |
| reproduction that does no involve the union of sex cells and in which one parent produces offspring identical to itself | asexual reproduction |
| the passing of genetic traits from parent to offspring | heredity |
| the sum of all chemical processes that occur in an organism | metabolism |
| 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 organisms or animal wastes and consuming, or absorbing the nutrients | decomposer |
| 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 | protein |
| a class of energy giving nutrients that includes sugars, starches, and fiber; contains carbon, hydrogen, and oxygen | carbohydrate |
| a type of biochemical that does not dissolve in water; fats and steroids are lipids | lipid |
| a lipid that contains phosphorus and that is a structural component in cell membranes | phospholipid |
| a molecule that acts as the main energy source for cell processes | ATP, adenosine triphosphate |
| a molecule made up of subunits called nucleotides | nucleic acid |
| the smallest unit that can perform all life processes; are covered by a membrane and have DNA and cytoplasm | cell |
| organisms are made up of 70% _____ | water |
| What necessity of life contains oxygen? | air |
| Why do organisms need food? | food gives energy and raw materials needed to carry on life processes |
| organisms store energy in _____ | lipids |
| most chemical reactions involved in metabolism require _____ | water |
| How long can humans survive without water? | 3 days |
| Organisms turn sunlight into energy during ______________ | photosythesis |
| Is a frog a producer or a consumer? | consumer |
| Nutrients are made up of __________, a substance created when two or more atoms combine. | molecules |
| proteins that speed up chemical reactions | enzymes |
| a protein found in read blood cells that attaches to oxygen | hemoglobin |
| True or False: Lipds mix with water. | False |
| What stores all of the information needed to make proteins? | nucleic acids |
| Air is a mixture of gases, especially __________ and ___________ ____________ | oxygen and carbon dioxide |
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Shields97
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