Unit 7

Question 1

Speciation

Answer 1

when 2 populations become reprofuctively isolated from each other

Question 2

sympatric speciation

Answer 2

occurs from a single ancestral species in the same geographic

Question 3

allopatric speciation

Answer 3

geographical isolation where populations are separated

Question 4

temporal isolation

Answer 4

species have different mating seasons

Question 5

mechanical isolation

Answer 5

where there are differences in reproductive organs making it physically impossible for them to mate

Question 6

Hardy-Weinberg equilibrium

Answer 6

genetic variation in a population will remain constant from one generation to the next

Question 7

what can the Hardy-Weinberg equilibrium can be disturbed by?

Answer 7

mutations, natural selection, nonrandom mating, genetic drift, and gene flow

Question 8

Homologous structures

Answer 8

when 2 species have similar structures indicating shared ancestry

Question 9

Analogous structures

Answer 9

different structures but similar function

Question 10

vestigial structures

Answer 10

a trait that you have from an ancestor but you don’t use it (Ex:tailbone)

Question 11

5 principles of theory of evolution by natural selection

Answer 11

variation, inheritance, selection, time, and adaptation.