CH11 – Divergence, Sensory Drive & Speciation

Question 1

Selection/Evolution/Speciation

Answer 1

sexual selection, individuals with certain characteristics more likely to obtain mates. Males often show out to attract mates.

Question 2

Elaboration and Innovation

Answer 2

over evolution, traits change in value along the same axis of variation. Innovation - this occurs when a new trait arises that is not down an already existing axis of variation ie. a new call type in mate choice

Question 3

Assortative mating

Answer 3

individuals prefer mates tht have a similar phenotype or genotype for a given trait

Question 4

Reproductive isolation

Answer 4

the inability of a species to breed successfully with related species due to geographical, behavioral, physiological, or genetic barriers or differences

Question 5

Hybridization

Answer 5

the hybridization between two or more distinct lineages that contributes to the origin of a new species

Question 6

Sensory Drive

Answer 6

characteristics from the environment lead to selection pressure resulting in changes in teh form of sensory systems and signals to be more effective under prevailing environmental conditions