19- anole lizzards

Question 1

3 important aspects of experimental design

Answer 1

1. large number of samples
2. include at least one treatment and control
3. Data collection

Question 2

what is inductive reasoning?

Answer 2

draw general conclusions based on specific data

Question 3

what is microevolution?

Answer 3

occurs when the proportion of individuals with a certain trait, genotype and allele frequency, changes from one generation to the next

within the same species

Question 4

what is macroevolution?

Answer 4

when the difference becomes so different between two or more populations that individuals from those populations can no longer mate

same as speciation

Question 5

what is stablilizing selection?

Answer 5

average phenotypes are beneficial, extreme traits will be selected against

Question 6

what is direct selection?

Answer 6

selects for extreme phenotypes (at one end of the spectrum) often occurs when the environment changes

ex, seed size may select different beak sizes in finches

Question 7

what is diversifying selection (disruptive)

Answer 7

selects two or more distinct phenotypes, while the intermediate phenotypes are less fit

ex. patchy camouflage is beneficial in rabbits

Question 8

what is frequency dependent selection?

Answer 8

favors phenotypes that are either common (positive frequency-dependent) or rare (negative frequency-dependent)

Question 9

what is intersexual selection?

Answer 9

males defend their territory or food patch and fight off other males that try to mate with females in that area. common in areas where food sources are patchy

females are choosy and choose the males with the most showy and costly features. common in areas where food sources are dispersed more evenly.