anthro test 2

evolve as the frequency of certain genes changes:individual organism dont evolve

interbreeding group of animals or plants that are reproductively isolated through anatomy,ecology,behavior,or geographic distribution from all other such groups

study of evolutionary phenomena that occur within a species

any factor(behavioral,ecological,or anatomical)that prevent male and female of 2 different pecies from hybridizing

the study of evolutionary phenomena that occur within a species

an alteration in the DNA that may or may not alter the functioni of a cell. Occurs in a gamere and may be paases from one genration to the next

type of evolution that takes traits from past plants or animals and is inherited to new generations to survuve in current envirment

• moevemnt of genes between populations
• example:when humans or other animals migrate fromone place to another

random changes in a gene frequency in a population

a example of genetic drift states that new populations become isolated from the original population(parent)and carry only the genetic variation of the founders

example of genetic drift.occurs when a large genticlly diverse population undergoes a rapid reduction in size and then increases again

nonrandom mating when females choose a particular mate and make decision on natural variation in male traits

natural selction that drives evolutionary change by selecting for greater or ledder freuwncy of a given trait in a populaton

selection that maintains a certain phnotype by slecting against deviation from it

the diversification of one founding species into multiple species and niches

evoltution changes at an avergae space(never stops)

a technique used to estimate age of organic itms from PLeistocene through present.

• is radioactive useful for organic remains from the past 30,000-40,000 years
• exists in atmosphere

change in base sequence of a gene that results from the change of a single base to a different base

the preserved remnants of once living things often burried in ground

study of the order of rock layers and the sequence of events they reflect

species phenotype remain static,changin very little over log periods of time

origin of earth burt of energy that exploded and rapidl expands(most common theory)

happened 543 million years ago its the very beging of animals and multicellular life(in water)

technique used for estimating the age of organic items from the latest Pleistocene through the present(including fossils and artifacts found)

relative dating technique using comparisons from differnt stratigraphic sequences to eliminate which layers are older and which are younger

process of determining an approximate computed age in archaeology and geology

study of what happenes to the remains if an animal from the time of death to the time of the discovery

study of extinct organisms based on their fossilized remains

chronometric techniques that use radioactive decay of isotopes to estimate age

the origin or original source(as a fossil)

time it takes fro half of the original amount of an unstable isotope of an elemnt to decay into more stable forms