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Living things SRB
the study of living things
| Question | Answer |
|---|---|
| the smallest unit that can perform all life processes | cell |
| anything that can cause 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 | homeostatis |
| reprodution in which the sex cells from two parents unite, producing offspring that shares 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 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 numtrients | decomposer |
| a molecule that is made up of amino acids and 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, startches and fiber; contains carbon, hydrogen and oxygen | carbohydrate |
| a type of biochemical that does not dissolve in water; fats and steroids | lipid |
| a lipid that contains phoshorus and that is a structural component in cell membranes | phosopholipid |
| a molecule that acts as the main energy source for cell processes | ATP (adenasine triphoshate) |
| a molecule made up of subunits called nucleotides | nucleic acid |
| What is the difference between growth and development? | growth involves a change in size; and development is a change in form |
| What are the 6 elements key to life | carbon, hydrogen, nitrogen, oxygen, sulfur, prophrous |
| What are the four basic needs of every organism? | water, air, food, a place to live |
| How long can humans survive without water? | 3 days |
| What are two things that food gives organisms? | energy and raw materials needed to carry on life processes |
| What are 2 ways that organisms get nutrients from food? | replace cells and body parts |
| What are the 5 chemical building blocks of cells? | proteins, carbohydrates, ATP's, lipids, and nucleic acid |
| a protein found in red blood cells that attatches to oxygen | hemoglobin |
| proteins that speed up chemical reactions | enzymes |
| carbohydrates made up of one sugar molecule or a few linked sugar molecules | simple carbohydrates |
| What does a cell contain? | all of the materials necessary for life |
| What are 3 examples of stimuli? | chemicals, gravity and light |
| What does DNA do? | it controls the structure and function of cells |
| What do orgnaisms pass on to their offspring? | copies of their DNA |
| How does a single-celled organism grow? | by getting larger and dividing and aking other organisms |
Created by:
SRBscience
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