Anthropology Ch. 2

organisms can change over time and give rise to new ones. all have common ancestor

derived from Plato where fixed ideas remain perferct and unchanging in eternity.

Every living thing is linked to every other living thing. Framework for understanding world.

a classification of various kinds of organisms

different species are grouped together based on their similarities to each other

Reproductive community of populations that occupy a society

ancient species destroyed by catastrophies and replaced by new divinely created species

species arise from others through a long transformation

present is key to the past, all life forms are related

if all living species were descended from single parental species

a two step mechanistic explanation of how descent with modification takes place. 1. Genetic variation 2. best varient for env. survives

common ancestors

Assumes members of species respond differently to environment. the variants that are fitter pass on trait.

measure of organisms ability to compete for existence

Shaping of useful features of an organism by natural selection for the function they perform.

Adaptation followed by reshaping for new purpose.

multiple traits from both parents are passed on to offspring.

heredity is based on nonblending.

individual gets one particle for each trait.

each pair of particles separates when germ cells are formed.

receives the same particle from each parent for a trait.

receives different particles from each parent for a trait.

single gene may affect more than one phenotypic trait.

many genes are responsible for phenotypic trait like skin colour.

molecular structure of genes.

measurable overt characteristics of an organism.

table of graph that displays possible range of phenotypic outcomes for a given genotype in dif envirn.

organism actively moves to different environment.