final Flashcards

(55 cards)

1
Q

what is coevolution

A

closely associated species influence each other’s evolution
serious mutualism

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2
Q

what are engineering tools

A

used to discover the three genes in the monarch that allow them to eat milkweed containing the alkaloid toxin

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3
Q

cheetah and Thompson Gazelle

A

Cheetah evolved to run fast enough to catch gazelles. the Gazelle evolved to run fast enough to not get caught everytime

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4
Q

how/ why have ants and fungi coevolved?

A

ants depend on fungi for food. Fungi rely on ant for nutrients and protection

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5
Q

why are puppies attractive to us

A

they have evolved to communicate with humans
eyebrow movement
knows point
eye contact
bark

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6
Q

what is directional selection

A

evolve in one direction

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7
Q

what is disruptive selection

A

evolve in 2 extremes

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8
Q

stabilizing selection

A

evolve to stabilize one population

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9
Q

which type of selection applies to the adaptation of gall sizes in goldenrod gall flies

A

directional
bird selectively prey on larger galls

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10
Q

eurytoma gigantea

A

wasps ovipositer is too short to penetrate larger galls
the parasatoid wasps causes selection pressure favoring gall flies that form large galls

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11
Q

sexual selection

A

adaptations for gathering mates for breeding

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12
Q

sexual dimorphism

A

distinct differences between Male and female

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13
Q

male-male competition

A

female choice
male bird pretty to compete for the female gaze

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14
Q

polygny

A

one male mates w more than one female

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15
Q

female choice

A

intersexual selection

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16
Q

male choice

A

intrasexual selection

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17
Q

why isnt there sexual dimorphism in Canada goose

A

equal investment in reproduction and care for young

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18
Q

monogamy

A

1 partner for life

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19
Q

microevolution

A

genetic change in population from one generation to the next
change in gene frequency

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20
Q

macroevolution

A

process through which new species arise

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21
Q

mutation

A

changing of genes not on purpose

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22
Q

genetic drift

A

changes in gene frequency in a population over several generations due to random mating events

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23
Q

why are the green and brown beetles still the same species

A

they are capable of interbreeding

24
Q

how could a new species of beetle evolve in this genetic situation?

A

geographic isolation

25
geographic isolation
physical barriers divide a population and prevent interbreeding
26
reproductive isolation
genetic changes evolve in separate population that prevent them from interbreeding
27
human induced microevolution
microevolution of pesticide resistent populations within species
28
why havent human races evolved into different species
people travel and interbreed
29
how did malaria affect Sickle Cell trait
people with one sickle cell reccessive trait have a resistance to malaria
30
mass extinction events
short intervals of geological time when geographically widespread "higher taxa" of creatures disappear
31
extinction is a driver of evolution
loss of biologically dominant taxon allows survivors of another group to flourish
32
how many mass extinction events
5
33
which mass extinction event was the worst
permian extinction with a 96% extinction rate
34
which extinction was the most recent
cretaceous (K-T) 76% extinction rate
35
causes of mass extinction extraterrestrial
1. impacts of comets/asteroids 2. high energy radiation from nearby supernova explosion
36
terrestrial mechanism
1. changes in configuration of continents due to motion of tectonic plates- affect global climate 2. large scale volcanic eruptions associated with tectonic events
37
what is the Kump Hypothesis
greenhouse extinction followed by hydrogen sulfide oceans
38
what causes mass extinction
multiple interacting events
39
bottom line about extinction
successful survivors evolve
40
father of genetics/ evolution
Charles Darwin
41
5 contribution Darwin made to evolution science
1. discoveries on Galapagos islands 2. describe finch species on each island- apparently related to a generalized finch 3. assertation that all animals descended from a smaller group of common ancestors 4.Natural selection 5.assertation that human evolved too
42
Artificial selection
a model of the process of natural selection that influenced Darwin's thinking humans intentionally direct traits (dog breeds)
43
how does natural selection differ from artificial selection
natural selection is left up to chance
44
population ecology
limits to population growth density-dependent factors affecting survival
45
what results in overpopulation
reproduction by species
46
t or f inherited traits equip some individuals to succeed more than others in different environmental situations
true
47
differential success is
survival of the fittest
48
t or f traits of favored individuals will become more prominent in succeeding generations and populations will change
true
49
environmental change keeps what moving?
evolution
50
what is the modern gene theory
things that Darwin didnt know
51
how did natural selection affect the development of coat color of the rock pocket mouse
the light colored mice that lived in the dark rocks were easier prey so they evolved to have darker fur
52
autosomal recessive diseases
1. sickle cell anemia 2. cystic fibrosis 3. phenylketoneuria (PKU)
53
why dont alleles that cause serious diseases disappear from the human population
sometime the heterozygous recessive gene can be beneficial with another disease like sickle cell and malaria
54
what assupmtions must be met to make the H-W equation work
1. pop is very large and no genetic drift occurs 2.matings are random 3.no mutation 4. no migration 5.no selection
55
inbreeding
mating w/ close relatives