Chap. 16 Origin of Species

Question 1

adaptive radiation

Answer 1

process where organisms evolve fast from ancestor into many new forms

Question 2

extinction

Answer 2

death of all members of a species

Question 3

isolating mechanism

Answer 3

Traits/geological factors that prevent interbreeding & maintain reproductive isolation

Question 4

postmating isolating mechanism

Answer 4

Mechanisms that prevent the formation of vigorous, fertile hybrids between species. Example is infertile offspring.

Question 5

premating isolating mechanism

Answer 5

mechanism that prevent mating between species.

Question 6

speciation

Answer 6

process of species formation in which a single species splits in 2 or more species

Question 7

species

Answer 7

a group of populations that evolve independently

Question 8

reproductive isolation

Answer 8

failure of organisms of one population to breed successfully with members of another

Question 9

Temporal Isolation

Answer 9

No mate because active at diff time of day/diff season

Question 10

Ecological Isolation

Answer 10

No mate because diff. habitat

Question 11

Behavioral Isolation

Answer 11

No mate because diff. behavior e.g. specific bird mating calls with only with same species of bird

Question 12

Mechanical Isolation

Answer 12

Physical incompatibility between reproductive organs of 2 organisms

Question 13

Geographic Isolation

Answer 13

No mate because geographic barrier e.g. river, mountain

Question 14

Causes of extinction

Answer 14

habitat loss, overhunting, climate change, pollution, disease spread

Question 15

Allopatric speciation

Answer 15

evolution in species due to geographical barrier e.g. cow have barrier. desert one side field other side. desert cow eat cacti. field side eat grass

Question 16

Sympatric speciation

Answer 16

evolution of new species from surviving ancestors in same geographic area. e.g. catholic beetle that come from communist beetle in Alhambra.