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evolution

Across
difference between cells, individual organisms, or groups of organisms of any species caused either by genetic differences
trait with a current functional role in the life of an organism that is maintained and evolved
situation where different species may live in the same area, but properties of individuals prevent them from interbreeding.
formation of new and distinct species in the course of evolution.
refers to a population of animals, plants, or other organisms that are separated from exchanging genetic material with other organisms of the same species.
organisms that are better adapted to their environment tend to survive longer and transmit more of their genetic characteristics
survive to reproductive age, find a mate, and produce offspring.
the frequency of occurrence or proportions of different alleles of a particular gene in a given population.
Down
collection of genes in an interbreeding population that includes each gene at a certain frequency in relation to its alleles
branch of biology that deals with the geographical distribution of plants and animals.
group of organisms of one species that interbreed and live in the same place at the same time
mechanism that prevents species from mating because they breed at different times.
important evolutionary mechanism that helps members of the same species identify each other as proper mates
the process by which different kinds of living organisms are thought to have developed and diversified from earlier forms during the history of the earth.
group of closely related organisms that are very similar to each other and are usually capable of interbreeding and producing fertile offspring.