Speciation

Question 1

clade

Answer 1

group of organisms that consists of an ancestor and all its descendents

Question 2

taxon

Answer 2

named taxonomic group

Question 3

where would the most recent common ancestor be

Answer 3

most recent shared node

Question 4

what are used to construct phylogenetic trees

Answer 4

only homologous traits

Question 5

speciation

Answer 5

the engine of biodiversity

Question 6

species

Answer 6

a group of organisms that share certain traits

Question 7

morphological species concept

Answer 7

members of species look alike and share physical traits

Question 8

lineage species concept also known as

Answer 8

phylogenetic species concept

Question 9

lineage species concept

Answer 9

species as branches on the tree of life

Question 10

ecological species concept

Answer 10

species in which a species is a set of organisms adapted to a particular set of resources, called a niche, in the environment

Question 11

biological species concept

Answer 11

groups of actually or potentially interbreediing populations which are reproductively isolated from other such groups

Question 12

there is no single definition of species that can apply

Answer 12

to all organisms

Question 13

sexual dimorphism

Answer 13

females and males of the same species look different from one another

Question 14

when is morphological species concept used

Answer 14

when there is nothing else to resort to, lack of behavioral or reproductive behaviors observations
fossils

Question 15

what species can lineage species concept describe

Answer 15

organisms without sexual reproduction
bacteria

Question 16

in a ecological species concept, every species would

Answer 16

occupy a specific niche

Question 17

concept used on interbreeding populations

Answer 17

biological species concept

Question 18

in biological species concept, evolutionary forces

Answer 18

operate independently on taxa and they have become different species

Question 19

speciation

Answer 19

one species splits intot two

Question 20

speciation in biological species concept

Answer 20

the evolution of reproductive isolation within a population whose members formerly exchanged genes

Question 21

allopatric speciation

Answer 21

involves geographic barriers

Question 22

sympatric speciation

Answer 22

without geographic barriers

Question 23

dominantt mode of speciation in most groups of sexually producing organism

Answer 23

allopatric

Question 24

sympatric speciation description

Answer 24

subpopulations somehow form in the same area and diverge such that gene flow between them ceases, even though interbreeding is not prevented by geography

Question 25

sympatric speciation example fish

Answer 25

certain wavelengths of color r processed better for certain fish at certain depths and they separate because of that even though there is no physical barrier

Question 26

barriers that prevent interbreeding before fertilization

Answer 26

prezygotic isolating barriers

Question 27

habitat isolation

Answer 27

eg terrestrial and aquatic species of garter snake

Question 28

temporal isolation

Answer 28

mating periods don't overlap

Question 29

behavioral isolation

Answer 29

individuals reject or fail to recognize potential mating partner based on courtship rituals or mating signals

Question 30

mechanical isolation

Answer 30

differences in size, shape, position of reproductive organs make mating impossible

Question 31

gametic isolation

Answer 31

sperm and egg fail to fuse sea urchins

Question 32

postzygotic isolating barrier

Answer 32

after fertilization

Question 33

hybrid inviability

Answer 33

zygotes or adults have low survival rates or fail to develop/survive tigress and leopard

Question 34

hybrid infertility

Answer 34

mules, ligers

Question 35

hybrid breakdown

Answer 35

F1 hybrids are okay but later generations become inviable/infertile: rice cultivars