week 4

Question 1

of the following taxonomic levels, species found within the same ___ are the most closely related

Answer 1

family

Question 2

___ is the study of fossils

Answer 2

paleontology

Question 3

sympatric speciation specifically excludes

Answer 3

geographic isolation

Question 4

natural selection

Answer 4

results in evolutionary adaptation

Question 5

natural selection can be defined as

Answer 5

a process in which organisms with certain inherited traits are more likely to survive and reproduce than other individuals

Question 6

macroevolution incudes

Answer 6

all of these

Question 7

a period of ass extinction is often followed by

Answer 7

explosive diversification

Question 8

in the hardy-weinberg equation, 2pq represents

Answer 8

Aa

Question 9

graphically, the graduated model of speciation can be described as appearing as a

Answer 9

Y

Question 10

in the origin of species, darwin argued that the mechanism of descent with modification was

Answer 10

natural selection

Question 11

a pattern of evolution in which most change in appearance takes place during a relatively short period o time fits the ___ model of speciation

Answer 11

punctuated equilibium

Question 12

natural selection results in

Answer 12

offspring adapted to their current envirotment

Question 13

which o the following describes allopatric speciation

Answer 13

a population of squirrels is separated by the grand canyon. through time the two subpopulations evolve into two distinct species.

Question 14

which of the following is most likely to decrease genetic variation

Answer 14

stabilizing selection

Question 15

in the hardy-weinberg formula, what does p^2 represent

Answer 15

frequency of the homozygous doinants

Question 16

in the equations below the p2 represents which of the following

Answer 16

BB

Question 17

If a mutation occurs within a species that is responsible for a reproduction barrier ten a result may be

Answer 17

sympatirc speciation

Question 18

gene flow is accomplished by

Answer 18

migration

Question 19

genetic drift is the result of

Answer 19

chance

Question 20

if the frequency of p=.6 then the frequency of q would equal

Answer 20

.4

Question 21

the monterey pine and bishop’s ine inhabit some of the same areas of central california. the monterey pine releases pollen in february, while the bishops pine does so in april. this is an example of ___

Answer 21

temporal isolation

Question 22

___ is the study of the evolutionary relationships of organisms, past and present

Answer 22

systematics

Question 23

speciation that involves a population that has become separated from the rest of the species by a geographical barrier that prevents gene flow and that evolves into a new species is called

Answer 23

allopatric speciation

Question 24

which of the following is a characteristic of a population at hard-weinberg equilibrium

Answer 24

the population is not evolving

Question 25

your family is taking a long driving vacation across the midwestern and western united states. as you travel you notice that the flower, birds, and tress of the midwest and the rocky mountains are very different. as you ponder why, you remember that such differences in the distribution of species are part of the fields of

Answer 25

biogeography

Question 26

if p=.8 then q=

Answer 26

.2

Question 27

referencing the hardy-weinberg equation, p+q=

Answer 27

1

Question 28

which of the following is a component of the fossil record

Answer 28

bones of extinct whales

Question 29

in the hardy-weinberg formula what does 2pq represent

Answer 29

frequency of heterozygotes

Question 30

homology is evidence of

Answer 30

common ancestry

Question 31

___ barriers prevent the production of viable offspring

Answer 31

prezygotic isolating mechanisms

Question 32

if the frequency of one allele in a population is .7, what is the frequency of the alternate allele?

Answer 32

.3

Question 33

which of the following is not a requirement of natural selection

Answer 33

catastrophic events

Question 34

on what basis are populations assigned to the same biological species

Answer 34

besting able to interbreed and produce fertile offsrping

Question 35

during his trip on the beagle, darwin found that

Answer 35

plants and animals living on a continent seemed more closely related to each other than to plants and animals living in similar regions on other continents

Question 36

which of the following is an example of directional selection

Answer 36

there is an increase in antibiotic=resistant strains of bacteria

Question 37

which of the following is an example of stabilizing selection

Answer 37

the birth weight at which newborn humans are most likely to survive and the average weight of newborn humans are about the same.

Question 38

speciation requires

Answer 38

genetic isolation

Question 39

the founder effect differs from a population bottleneck in that the founder effect

Answer 39

involves the isolation of a small colony of individuals from a larger population.