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| nonliving parts of the environment |
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| a compund that releases hydrogen ions when dissolved in water;a substance,such as vinegar;with a sour taste |
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| rain that is more acidic than normal |
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the process by which cells use energy to transport molecules through the cell membrane from areas of low concentration to areas of high concentration |
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| any trait that helps an organisn survive and reproduve under a given set of environmental conditions |
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| A gel-like substance used in bacterial cultures |
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| (aquired immunodeficiency syndrome)the disease that results when the HIV virus attacks the human immune system |
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| A condition in which a person's immune system is overly sensitive to environment substances that are normally harmless |
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| Any one of several building blocks of protein |
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| A complex,multicellular organism with specialized tissues and organs, but no cell walls;a heterotroph that obtains energy by consuming other organisms |
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| A protein,produced by the immune system,that either attacks invading pathogens or marks them for killing |
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| A molecule found on the outer surfaces of cells that the immune system recognizes as either part of the body or an outside invader |
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| A substance that reduces the effects of histamines and the symptoms they cause |
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| The process of breeding two organisms with desirable characteristics to produce offspring that has thte advantages of both parents |
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| A method of reproduction in which all the genes passed on to the offspring come from a single individual or parent |
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Something accepted as true that may or may not actually be true |
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| (adenosine triphosphate)a compound that stores energy in cells |
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| An organism that produces its own food;the source of energy for all other living things on Earth |
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| any one of many single-celled organisms without a distinct nucleus |
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| A tool that measures mass by comparing the unknown mass of an object with an object of known mass |
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| A compund that produces hydroxude ions when dissolved in water |
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| A tendency to favor something;prejudice |
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| A chemical process that occurs in a living thing |
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| the variety of species in an area |
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| Large groups of ecosystems with similar climates and organisms;examples include the tundra,taiga,temperate forest,chaparral,tropical rainforest,dessert,temperate greassland,tropical savanna grassland,and polar and high-mountain ice |
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| all of the Earth's ecosystems,collectively;the biologically inhabited portions of Earth,including all of the water,land,and air in which organisms survive |
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| The combination of technology and biological sciences |
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The living parts of the environment |
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| The chemical link between atoms that hold molecules together |
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| To adjust the scale of a measurement tool |
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| An organism that survives by eating animals |
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| The largest population of any single species that an area can support |
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| A substance that can speed up the rate of a chemical reaction without being changed or used up during the reaction |
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