Ap biology unit 7 terms

Species are fixed (unchanged)

Founder of taxononmy

Palientologist

Deeper strata

fossils

geological change results from slow and gradual continuoius process

Published theory of evolution

Use and disuse of body parts

Inheritance of acquired characteristics

Galapagos Isalnds

mechanism for evuolution is natural selectoin

A change in allele frequencies in a population over generations

A localized group of individuals capable of interbreeding and producing fertile offspring

consits of all the alleles for all loci in a population

desribes a population that is NOT evolving

no mutaitons

random mating

no natural selectoin

extremely low population size

no gene flow

differential success in reproduction results in certain alleles being passed on to the next generation

describes how allele frequencies change over generations

(greater affect on smaller populations)

occurs when a few individuals become isolated from a larger population

A sudden reduction in population size due to a change in the environment

consists of movement of alleles among populations

favors individuals at one end of the phenotypic range

favors individuals at both extremes

favors intermediate variants and acts against extreme phenotypes

competition among individuals of one sex (often males) for mates of the opposite sex

MALE FIGHT FOR MATE

occurs when individuals of one sex (usually females) are choosy in selecting their mates

LADY PICK MALE

development of a new species

a species completely changes

a new branch of species, old one still around too

defines a species that can interbreed and produce viable, fertile offspring

impede mating between species or hinder the fertilization of the ova

2 species live in different habitats

low chance of meeting

special signals that attract males, along with elaborate behaviors unique to species

2 species mate at a different time

anatomically incompatable

gametes raraly fuse to form a zygote

sperm might not be able to travel to the ova

prevents the hybrid zygote from being a fertile adult

hybrids arent viable

do not survive

hybrids are completely or largely sterile

the first generation is fertile, but as generations go on the offspring are sterile

defines a species in terms of its ecological niche

the set of environmental resources it uses

characterizes species in terms of structual factors

defines a species as a set of individuals that share a common ancestor

speciation takes place in populations with geographically seperate ranges

the speciation of organisms when the environment changes and new resources are available

example: chain islands

speciation takes place in geographically overlapping populations

long period of stasis (equilibrium) punctuated by episodes of speciation

Conditions of early earth favored conditions of organic compounds

tested paring and Haldane hypothesis (worked)

produced amino acids