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Evolution Unit 5

Evolution vocabulary

TermDefinition
acquired characteristic A characteristic developed during an individual's lifetime; it is not passed on to succeeding generations.
adaptation A variation in an inherited trait that makes the organism better able to survive in a changing environment.
amino acids The basic building blocks of proteins. They contain an amine group and a carboxyl group.
asexual reproduction Reproduction involving only one parent by using the process of mitosis. The offspring are genetically identical to the parent and to each other.
biocide A chemical that is used to kill living organisms.
biotic factors Living things and their effect on each other.
chromosome A structure found in the cell nucleus that is made of DNA and protein. It contains the hereditary information.
cloning The production of genetically identical organisms.
common ancestors Organisms from which closely related organisms have evolved.
differentiation The processes that causes the cells of an organism to develop into specialized tissues and organs. The cells get their different jobs.
diversity A condition in which differences or variety exist, as opposed to uniformity.
DNA (deoxyribonucleic acid) The nucleic acid that stores the hereditary information or genetic material. It is made of repeating units called nucleotides.
ecosystem The interaction of living things and their nonliving environment.
egg cell The female monoploid (n) gamete or sex cell. This cell contains half the normal amount of DNA, with single chromosomes, not pairs.
embryo An organism in the early stages of development
environment All the living and nonliving things that surround a living thing.
extinction The destruction of all members of a particular species.
fossil The remains or traces of an organism that lived long ago.
gametes Monoploid sex cells produced in gonads by meiotic cell division; sperm and egg.
gene frequency The percentage of individuals in a population carrying a particular gene.
genetics The study of DNA and how the hereditary information is transmitted from one generation to the next.
geographic isolation The separation of a population by a natural barrier that prevents them from interbreeding. This eventually results in the development of new species
habitat The portion of the environment in which an organism exists.
homologous structures Structures that have the same basic arrangement and evolutionary origin, although not necessarily the same function.
mammals Animals with hair on their bodies who give birth to living young; the young are nourished on milk from female mammary glands.
meiosis, meiotic cell division Cell division that produced gametes (sex cells, eggs and sperm). Produces cells with half the normal amount of DNA for that species and the cells are all unique.
migration The movement of animals from one region or community to another.
mitosis, mitotic cell division Cell division that produces two identical cells each with the normal (2n) number of chromosomes.
mutation A change in the genetic material
natural selection Darwin's evolutionary theory that states that there are variations in organisms that will make some organisms better fitted for survival than others.
niche An organism's particular role in the community.
nucleus A large, membrane-enclosed organelle that contains the chromosomes; the control center of the cell.
offspring The result of the reproduction of organisms
organism An individual living thing
selective breeding The manipulation of reproductive processes to produce offspring with specialized traits; choosing mates or crossing traits to produce offspring that have desired traits
sexual reproduction A form of reproduction in which two gametes fuse to form a new individual
species A group of organisms that can interbreed and produce fertile offspring
succession The replacement of one type of community by another until the stable climax community is reached, which remains in place until it is destroyed by some catastrophe.
toxic Poisonous.
trait A characteristic of an organism
variation
Evolution
heritability
resistance
artificial selection The manipulation of reproductive processes to produce offspring with specialized traits; choosing mates or crossing traits to produce offspring that have desired traits
population
competition
offspring
recombination of genes
competition
Created by: Dr. Lamont