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Definition
| the posterior segment of an animla that usually houses the organs of digestion and excretion. |
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Term
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Definition
| any nonliving component of an ecosystem |
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Definition
| precipitation with below-normal PH, often the result of industrial pollution and automobile exhaust. |
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Term
| Acquired immune deficiency syndrome (AIDS) |
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Definition
| a group of diseases caused by a viral disruption in the immune system. |
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Term
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Definition
| the amount of energy required for a chemical reaction to get started and continue on its own. |
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Definition
| the movement of any substance across a cell membrane with the use of energy from ATP. |
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Definition
| an inherited trait that increases an organism's chance of survival in a particular environment. |
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Definition
| an evolutionary pattern in whcich many species evolve from a single ancestral species. |
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Definition
| nitrogen base that bonds with Thymine in a DNA molecule. Also part of ATP. |
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Term
| Adenosine triphosphate (ATP) |
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Definition
| storage molecule for engery is composed of the molecule adenosine with three phosphate groups attached. |
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Term
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Definition
| the breakdown of pyruvic acid with the use of oxygen. |
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Definition
| the process by which pyruvic acid is converted to ethyl alcohol; the anaerobic action of yeast on the sugars found in fruits and grains. |
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Definition
| a population explosion of algae that colors the environment. |
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Term
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Definition
| an alternative form of a gene. |
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Term
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Definition
| the percentage of an allele in a gene pool. |
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Term
| Alternation of generations |
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Definition
| a sexual life cycle in plants and algae involving two or more phases. |
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Term
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Definition
| one of 20 monomers that form proteins. |
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Term
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Definition
| a stage of mitosis and meiosis in which the chromosome separate. |
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Definition
| The bodily structure of a plant or an animal or of any of its parts. |
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Definition
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Definition
| the front end of a bilaterally symmetrical organism. |
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Definition
| plant structure in which pollen grains are produced. |
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Term
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Definition
| a chemical produced by microorganisms that is capable of inhibiting the growth of some bacteria. |
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Term
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Definition
| a blood protein produced by B cells that destroy antigens. |
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Term
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Definition
| a region of tRNA consisting of three bases complementary to the codon of mRNA. |
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Term
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Definition
| a substance that stimulates the production of antibodies. |
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Term
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Definition
| an underground bed or layer of earth, gravel, or porous stone that yields water. |
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Term
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Definition
| in plants, asexual reproduction manipulated by humans. |
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Term
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Definition
| the production of offspring that does not involve the union of gametes. |
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Term
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Definition
| a centriole with its radiating fibers that is active during cell division. |
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Term
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Definition
| the fundamental unit of matter. |
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Term
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Definition
| the number of protons in an atom. |
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Term
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Definition
| an organism that uses energy, such as light, to synthesize organic molecules from inorganic molecules. |
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Term
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Definition
| referring to any pollutant that is subject to decay by organism. |
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Definition
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Definition
| A major regional or global biotic community, such as a grassland or desert, characterized chiefly by the dominant forms of plant life and the prevailing climate. |
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Term
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Definition
| a living componenet of an ecosystem |
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Term
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Definition
| the uncontrolled growth of cells |
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Term
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Definition
| an organic compound composed of carbon, hydrogen, and oxygen in which the hydrogen-to-oxygen ratio is two to one. |
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Term
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Definition
| a consumer that eats other consumers. |
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Term
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Definition
| the maximum number of individuals of a species that an ecosystem is capable of supporting. |
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Term
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Definition
| a membrane bound structure that is the basic unit of life. |
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Term
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Definition
| A population of identical cells grown in the laboratory. |
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Term
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Definition
| the events of cell division; includes interphase, mitosis, and cytokinesis. |
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Term
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Definition
| the formation of cells from a parent cell. |
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Term
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Definition
| The outer lipid boundary of a cell. |
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Term
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Definition
| a membrane that divides the daughter cells following mitosis in plants. |
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Term
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Definition
| the theory that all living things are made up of cells, that cells are the basic units of organisms, and that cells come from only existing cells. |
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Term
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Definition
| an extracellular, strengthening component of a plant cell. |
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Term
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Definition
| Of or relating to a temperature scale that registers the freezing point of water as 0 and the boiling point as 100 under normal atmospheric pressure. |
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Term
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Definition
| form the asters during mitosis |
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Term
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Definition
| the structure formed when chromatids join. |
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Term
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Definition
| the process of breaking chemical bonds, forming new bonds, or both. |
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Term
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Definition
| a plastid containing chlorophyll; the site of photosynthesis. |
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Term
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Definition
| Any of a group of green pigments that are found in the chloroplasts of plants and in other photosynthetic organisms. |
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Term
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Definition
| A threadlike linear strand of DNA and associated proteins in the nucleus of eukaryotic cells that carries the genes and functions in the transmission of hereditary information. |
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Term
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Definition
| A microscopic hairlike structure extending from the surface of a cell or unicellular organism. Capable of rhythmical motion. |
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Term
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Definition
| the system that distributes oxygen and nutrients to cells in all parts of the body. |
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Term
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Definition
| in taxonomy, a group of similar orders. |
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Term
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Definition
| the grouping or objects, organisms, or phenomena into a new or established organizational scheme. |
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Term
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Definition
| a community of organisms that will remain stable in an area as long as the area is undisturbed. |
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Term
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Definition
| an offspring produced by asexual reproduction. |
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Term
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Definition
| the condition when two alleles of the same gene neither or which totally masks the other. |
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Term
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Definition
| a group of three sequential nitrogen bases of an mRNA molecule. |
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Term
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Definition
| the joint change of teracting species |
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Term
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Definition
| a form of symbiosis in which one organism benefits and the other neither benefits nor is harmed. |
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Term
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Definition
| all the populations in one area. |
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Term
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Definition
| the use or defens of a resource by an organism that reduces the availability of that resource to others. |
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Term
| Complete digestive system |
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Definition
| a system in which food enters via the mouth and passes sequentially through the system to the anus. |
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Term
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Definition
| two or more elements that are chemically joine. |
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Term
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Definition
| a heterotroph that obtains energy from chemical bonds in nutreints it eats. |
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Term
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Definition
| a bond that forms when two atoms share one or more pairs of electrons. |
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Term
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Definition
| the exchange of genes by homologous chromosomes during meiosis. |
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Term
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Definition
| a reproductive process in which pollen from plant is transferred to the stigma of another plant. |
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Term
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Definition
| the division of the cytoplasm of a parent cell into two daughter cells. |
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Term
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Definition
| the jelly like fluid of a cells interior |
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Term
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Definition
| nitrogen base that bonds with guanine in a DNA molecule. |
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Term
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Definition
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Term
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Definition
| an organism that uses nutrients from dead plants and animals. |
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Term
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Definition
| a mutation in which a segment of DNA breaks off of a chromosome. |
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Term
| Density-dependent factors |
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Definition
| variables related to the density of a population that affect population size. |
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Term
| Density-independent factors |
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Definition
| variable that affect population size regardless of population density |
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Term
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Definition
| a double helix shaped nucleic acid. |
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Term
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Definition
| a five carbon sugar molecule found in DNA. |
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Term
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Definition
| a written set of choices that leads to the name of an organism. |
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Term
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Definition
| an angiosperm with two cotyledons, net vanation, and flower parts in four or five. |
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Term
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Definition
| a cross between individuals that involves the paring of contrasting traits. |
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Term
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Definition
| a cell that contains both chromosomes of a homogous pair. |
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Term
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Definition
| the process of two or more related species becoming more and more dissimilar. |
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Term
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Definition
| referring to an allele that masks the presence of another allele for the same characteristics. |
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