spring test 3

Question 1

we can get speciation in an ____ population because there is no ____

Answer 1

in an ISOLATED pop, no GENE FLOW

Question 2

how many percentage of fish species are fresh water

Answer 2

42%

Question 3

beefalo = ? + ?

Answer 3

5/8 cattle (cow taurus) + 3/8 bison

Question 4

in yellow stone, how are the bison protected?

Answer 4

there is no gene flow with beefalos, pure bisons

Question 5

definition of speciation

Answer 5

creation of anew species from existing one

Question 6

speciation = __ + ___

Answer 6

evolution + isolation

Question 7

biological species definition

Answer 7

group of organisms that interbreed to produce fertile offspring

Question 8

morphological species definition

Answer 8

organisms that looks the same are the same species

Question 9

___ + ___ = evolution

Answer 9

mutation + selection

Question 10

Isolations occur in 2 ways

Answer 10

geographic, reproductive

Question 11

geographic isolation

Answer 11

isolated because of a geographic barrier like ocean, mountain. ie: saber tooth to tiger and lions

Question 12

reproductive isolation

Answer 12

keeps them from breeding

Question 13

2 types of reproductive isolation

Answer 13

prezygotic and postzygotic

Question 14

prezygotic isolation

Answer 14

sperm and egg never meet ie: eastern & western skunk

Question 15

postzyogtic isolation

Answer 15

sperm & egg meet but offspring are infertile

Question 16

ways to study speciation (6)

Answer 16

fossil record, vestigial structures, homologous structures, embryology, genetics, phylogenetic trees

Question 17

allopatric speciation

Answer 17

speciation happens with a geographic barrier

Question 18

sympatric speciation

Answer 18

speciation happens without geographic barrier.eg: cichlids

Question 19

phylogenetic tree

Answer 19

shows common ancestor, and most recent common ancestor = more related

Question 20

vestigial structures

Answer 20

residual parts from ancestors that now has no use eg: eye of cave fish, back legs of whales, goosebumps for humans

Question 21

are appendix vestigial sturcutres

Answer 21

no, provides bacteria

Question 22

homologous structures

Answer 22

structures on diff species with same structure but diff function

Question 23

analogous structures

Answer 23

same function, diff structure. don’t show evolutionary history

Question 24

the fossil record

Answer 24

valley of the whales, shows physical adaptations of animals through time

Question 25

convergent evolution

Answer 25

same characteristic evolves separately in two diff and not related species

Question 26

example of convergent evolution

Answer 26

human eye and squid eye. hedgehog and spiny anteater opossum and capuchen