Lecture 9

Question 1

Directional Selection

Answer 1

Favors individuals at one end of phenotypic range
ex. lion speed

Question 2

Stabilizing Selection

Answer 2

Favors intermediate phenotypes
ex. human birth weight

Question 3

Disruptive Selection

Answer 3

Favors both extremes

Question 4

Microevolution

Answer 4

Small changes on populations over short period of time

Question 5

Macroevolution

Answer 5

Larger morphological change on species over long periods of time

Question 6

Morphological species concept

Answer 6

grouping based on appearence

Question 7

Phylogenetic species concept

Answer 7

grouping based on common evolution

Question 8

Biological species concept

Answer 8

grouping based on ability to mate

Question 9

Limitations of Morphological species concept

Answer 9

1. Morphology changes throughout a lifetime
2. Lack of variation among distinct species

Question 10

Limitations of Phylogenetic species concept

Answer 10

1. Disagreements about where to draw separations, i.e, which groups should be designated species (species versus subspecies)
2. Need good phylogenetic data

Question 11

Limitations of biological species concept

Answer 11

1. Asexual organisms
2. Fossils
3. Hybridization can occur
   between some species