Module 18

Question 1

speciation

Answer 1

the formation of new and distinct species in the course of evolution.

Question 2

species

Answer 2

have different traits,habitats,behaviors,phenotypically different

Question 3

sympatric speciation

Answer 3

different species evolving in the same habitat

Question 4

Ernst Mayr

Answer 4

had a biological concept that groups of actually or potentially interbreeding Natural populations which are reproductively isolated from other such groups

Question 5

reproductive isolation

Answer 5

provides barrier to the interbreeding between populations

Question 6

prezygotic isolation

Answer 6

prevents the formation of zygotes

Question 7

postzygotic isolation

Answer 7

prevents the proper functioning of zygotes

Question 8

geographical isolation

Answer 8

species occur in different areas. which are often separated by a physical barrier such as a river or a mountain range

Question 9

ecological isolation

Answer 9

species occur in the same area, but they occupy different habitats and rarely encounter each other

Question 10

behavioral isolation

Answer 10

isolation between populations due to differences in courtship or mating behavior

Question 11

temporal isolation

Answer 11

form of reproductive isolation in which two populations reproduce at different times

Question 12

mechanical isolation

Answer 12

structural differnces between species. prevent them from mating

Question 13

prevent gamete fusion

Answer 13

gamete of one species functions poorly with the gamete of another.

example: trout and salmon release both eggs and sperm at the same time, but cannot form zygotes.

Question 14

infertility

Answer 14

the condition of being unable to reproduce

Question 15

hybrid inviability

Answer 15

A postzygotic barrier in which hybrid zygotes fail to develop or to reach sexual maturity

Question 16

allopatric speciation

Answer 16

populations geographically separated evolve in to different species

Question 17

little paradise kingfisher

Answer 17

same species, but different climates

Question 18

adaptation

Answer 18

modification of an organism or its parts that makes it more fit for existence

Question 19

Anolis lizards

Answer 19

males develop dewlap

Question 20

dewlap

Answer 20

the color of the dewlap was different depending on the environme

Question 21

gradualism

Answer 21

evolutionary change occurs slowly and change accumulates over long periods of time which leads to major changes

Question 22

punctuated equilibrium

Answer 22

species experience little to no change for long periods of time, which is punctuated by bursts of rapid changes.