causes of bottleneck effect

are molecules that are used to build up and repair body parts

in comparing the anatomy and the development of organisms. It shows a unity of plan among those that are related The more body structures the two species have in common the more closely the are related

indicate descent from common ancestor

in an agent of substance that can bring about a permanent alteration

-who observed that various geographic regiond have different plants and animal populations -accepted that there were extinct species

4 fourfes or mechanisms of evolution

evidences of evolution

-scotish naturalists, proposed that geological change occured gradually by the accumulation of small changes from processes like they are today

Gives evidence of relatedness between now widely different groups of organisms

observed species of organism on different islands that were clearly similar but had distinct differences he wrote "seeing this gradation and diversity of structure in one group of birds...."

lyells notion of the greater age of earth gave more time for gradual change in species

it refers to a common random fluctuations in the frequencies of alleles from generation to generation to change event can cause traits to be dominant also called genetic sampling error

published a book that detailed a mechanism for revolutionary change

is a process by which pieces of DNA are broken and recombined to produce new combination of alleles.. is an integral part of the complex process of meiosis in sexually reproducing organisms

are anatomical features that are usually reduced and have no function in many organisms

2 biochemical evidences

is based om the facts that certain enzymes and chemical processes are found in the cells

leads to new versions of proteins that help organisms adapt they increase an organisms changes of surviving

documents the existence of now extinct past species are preserved remains or traces of ancient organisms preserved remnant trapped in rocks

is the study of the geographic distributions of organism

this is a change in the dna sequence of the gene ultimate source of genetic variation is a source of new alleles in the population occurs when DNA gene is damaged or changed

are similar physical stuctures in organism that share a common ancestors but serve completely different functions

where most fossils are formed

if you have variation, differential reproduction, and hereditary you will have evolution by natural selection as an outcome

is now reffered to as an inheritance of acquired characteristics by which modification in an individual are cause by environment

is the exchange of alleles (genes) between two or more populations

are organs that were previously functional but only remnant in the present

are structure which are different appearance but same functions

is a concept of evolutionary biology applicable when one species is the ancestor of 2 or more species later in time

a specialist in the study of the forms of life existing in prehistoric or geologic times

does nit indicate common ancestry

may cause genetic disorders or cancer

actual mechanism for evolution was independently conceived pf and described by 2 naturalists:

Is an organism in its initial phases of development