evolution

Question 1

what is the evidence of evolution?

Answer 1

fossil record
biochemical evidence
comparative anatomy
observable events
biogeography

Question 2

what is paleontology

Answer 2

study of fossils

Question 3

ex of remains

Answer 3

bones, teeth, shells

Question 4

ex of traces

Answer 4

footprints, burrows

Question 5

why is the fossil record incomplete??????

Answer 5

fossils are rare, not alll organisms become fossils, the yonly form in sedimentary rock

Question 6

the compariso of fossils from different layers shows

Answer 6

life on earth has changed, number of life forms increased

Question 7

what are the 2 models of evolution

Answer 7

gradualism
punctated equilibrium

Question 8

gradualism

Answer 8

gradual change over a long period of time leads to species formation

Question 9

punctuated equilibrium

Answer 9

periods of rapid change in a species separted by by periods of little or no change

Question 10

biochemical evidence

Answer 10

uses amino acids to determine common ancestors

Question 11

closeley related species

Answer 11

exebit few amino acid differences

Question 12

species that have lots of different species

Answer 12

shared common ancestor more recnetly

Question 13

what is the strongest evidence

Answer 13

amino amino acid sequencing

Question 14

phylogentic tree

Answer 14

shwows number of amino acid differences

Question 15

homologous structures

Answer 15

similar genes (appearance) different function

Question 16

homologus structures show

Answer 16

organisms past and present

Question 17

anologous structure

Answer 17

same in function, not in structure..

Question 18

vestigial structures

Answer 18

structures that are present that do not have a purpose

Question 19

embryolgoy

Answer 19

simillar embryos show relationships to common ancestor

Question 20

biogeography

Answer 20

organisms living in different conteinemnts may be simillar bcof common ancestor

Question 21

observable events

Answer 21

changes in spcies over time that has been observered.

Question 22

migration of species can change

Answer 22

the allele frequnecy

Question 23

mutations can effect allele frequency by

Answer 23

adding a new allele or changing amout of present alleles

Question 24

genetic drift

Answer 24

random changes in allele frequency due to population size

Question 25

what is founders effect

Answer 25

occurs when few induviduals form new community

Question 26

what does founders effect result in

Answer 26

reduced genetic variation non random sample of genes

Question 27

bottleneck affect

Answer 27

when population size is greatly reduced for one generation

Question 28

bottleneck effect results

Answer 28

reduced genetic variation

Question 29

non random mating

Answer 29

having limited number of possible mates

Question 30

non random mating effects

Answer 30

allele frequenciy bc - limited geography - limited traits - can be closley related

Question 31

types of selection

Answer 31

stabilizing selection directional selecion disruptive selection sexual selection

Question 32

stabilizing selection

Answer 32

a type of natural selection in which genetic diversity decreases as the population stabilizes on a particular trait value

Question 33

directional selection

Answer 33

occurs when individuals with traits on one side of the mean in their population survive better or reproduce more than those on the other.

Question 34

disruptive selection

Answer 34

specific type of natural selection that actively selects against the intermediate in a population, favoring both extremes of the spectrum.