The smallest working unit in the system of classification. Among living organisms they are populations or groups of populations capable of interbreeding and producing fertile young.
In Taxonomy a group of like species. Ex. homo erectus ergo Homo.
The group of mammals that include lemurs, lorises, tarsiers, monkeys, apes and humans.
The class of vertebrate animals distinguished by bodies covered in fur, self-regulating temperatures and on females, milk producing mammary glands.
In biology structures possessed by different organisms that are superficially similar due to similar function; without sharing a common development pathway (ie bird wings and butterfly wings)
In biology, structures possessed by two different organisms that arise in a similar fashion and pass through similar stages during embryonic development though they may possess different functions (hand of a human vs wing of a bat)
The science of classifiction.
a series of beneficial adjustments to the environment
the evolutionary process through which factors in the environment exert pressure, favoring some traits and individuals over others to produce the next generation.
A segment of DNA occupying a specific place (or locus) on a chromosome; a basic unit of heredity.
A threadlikestand of DNA in the cell nucleus that carries gnees in a linear order. Humans have 22 plus two sex.
A chromosome pair that bears identical alleles for the same gene.
alternate forms of genes that occur at the same genetic locus.
a chromosome par that bears different alleles fro the same gene
The physical expression of a specific genetic trait such as blood type or stature, based on genetic and environmental influences. It may or may not reflect a particular genotype due to the variable expression of dominant and recessive alleles
The allesles possessed for a particular trait, such as blood type.
All the genetic variants possessed by the members of a population.
A group of similar, interbreeding individuals, sometimes defined geographically.
Selection acting to promote stability, rather than change, in a gene pool.