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Key Terms Biological Diversity
Key Terms
43
Science
9th Grade
09/24/2009

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Term
Biological Diversity
Definition
the variety of species and ecosystems on Earth and the ecological processes of which they are a part; ecosystem diversity, community diversity, and genetic diversity are three main components
Term
Species
Definition
Living things of the same kind that are able to reproduce successfully
Term
Embryo
Definition
An undeveloped organism in its beginning stages
Term
Genetics
Definition
The study of how heritable characteristics are transmitted through generations of organisms
Term
Clone
Definition
A genetically identical copy of an entire organism or of its cells or genes; cloning is the process of creating a clone
Term
Chromosome
Definition
A structure in which DNA is arranged and along which genes are located
Term
Ovule
Definition
Sac containing the female sex cells (gametes) of a plant
Term
Pistil
Definition
The female reproductive organ of a flower
Term
Genetic engineering
Definition
The intentional altering of the DNA of an organism if a population if organisms
Term
Stamen
Definition
the male reproductive organ of a flower
Term
Somatic/sex cells
Definition
relating to or affecting the body, especially the body as considered to be separate from the mind
Term
Aquaculture
Definition
farming of ocean and freshwater plants and animals for human consumption
Term
Spores
Definition
a small, usually one-celled reproductive structure produced by seedless plants, algae, fungi, and some protozoans that is capable of developing into a new individual
Term
Domestic
Definition
relating to or used in the home or everyday life within a household
Term
DNA
Definition
a nucleic acid molecule in the form of a twisted double strand double helix that is the major component of chromosomes and carries genetic information. DNA, which is found in all living organisms except some viruses, reproduces itself and is the means by which hereditary characteristics pass from one generation to the next.
Term
Environment
Definition
The air, water, minerals, organisms, and all other external factors surrounding and affecting a given organism at any time.
Term
Dichotomous key
Definition
a key for the identification of organisms based on a series of choices between alternative characters
Term
Ecosystem
Definition
a system formed by the interaction of a community of organisms with their environment
Term
Abiotic
Definition
non living
Term
Population
Definition
the amount of one species in an habitat
Term
Natural selection
Definition
the process by which forms of life having traits that better enable them to adapt to specific environmental pressures, as predators, changes in climate, or competition for food or mates, will tend to survive and reproduce in greater numbers than others of their kind, thus ensuring the perpetuation of those favorable traits in succeeding generations
Term
Decomposer
Definition
an organism, usually a bacterium or fungus, that breaks down the cells of dead plants and animals into simpler substances
Term
Niche
Definition
a habitat and its habitants, including its habits and how it interacts with other living and non-living things
Term
Phylum
Definition
The primary subdivision of a taxonomic kingdom, grouping together all classes of organisms that have the same body plan
Term
Speciation
Definition
The formation of new species as a result of geographic, physiological, anatomical, or behavioral factors that prevent previously interbreeding populations from breeding with each other
Term
Symbiosis
Definition
the living together of two dissimilar organisms, as in mutualism, commensalism, amensalism, or parasitism
Term
Mutualism
Definition
a relationship between two species of organisms in which both benefit from the association
Term
Subphyla
Definition
a category of related classes within a phylum.
Term
Diversity index
Definition
Statistic which is intended to measure the biodiversity of an ecosystem
Term
Genus
Definition
the usual major subdivision of a family or subfamily in the classification of organisms, usually consisting of more than one species
Term
Specialization
Definition
The adaptation of an organism or a part of an organism to a specific function or condition in response to environmental conditions
Term
Consumer
Definition
an organism, usually an animal, that feeds on plants or other animals
Term
Species
Definition
living things of the same kind that are able to reproduce successfully
Term
Evolution
Definition
change in the gene pool of a population from generation to generation by such processes as mutation, natural selection, and genetic drift
Term
Biotic
Definition
living
Term
Artificial Selection
Definition
Breeding by humans of plants and animals with desireable traits to prodice offspring with those desireable traits
Term
Artificial Insemination
Definition
Artificial collection and injection of sperm from male into a female; used in livestock breeding
Term
Biotechnology
Definition
The use of living things to make agriculuturalm industrial or medicinal products
Term
Clone
Definition
A genetically identical copy of an entire organism or of its cells or genes; cloning is the process of creating a clone
Term
In Vitro Fertilization
Definition
Fertilization that happens outside the body, usually in a petri dish; used in livestock breeding
Term
Complete DOminance
Definition
Two phenotypes possible. For example, EE Male and ee Female, attached ear lobes EE and Ee, detached is ee
Term
Incomplete Dominance
Definition
two different, dominance and recessive equals hybrid
Term
Co-Dominance
Definition
No recessive gene. Dominant C and Dominant S equals curly
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