Patterns of Evolution

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Patterns of Evolution
How it works
Natural Selection
Evidence of evolution
Speciation
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2
Which type of selection is occurring in a cricket
population that is changing from curved wings to
flat wings?

• 100 points

3
Directional selection

• 100 points

4
The two types of genetic drift are the bottleneck
effect and____________

• 200 points

5
the founder effect

• 200 points

6
What process of natural selection favors the
extreme phenotypes of a trait and eliminates
intermediate phenotypes??

• 300 points

7
Disruptive Selection

• 300 points

8
The situation in which allele frequencies in the
gene pool of a population remain constant is
called

• 400 points

9
Hardy-Weinberg equilibrium

• 400 points

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Double Jeopardy
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A change in the _______ _______ exemplifies
biological evolution.
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Gene pool
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The allele frequencies of a population are more
likely to change if
a. there are no disasters b. there is no gene
flow c. mating is not random d. there are no
mutations

• 100 points

14
Mating is not random

• 100 points

15
Fitness refers to what?

• 200 points

16
those individuals with favorable traits survive
and reproduce

• 200 points

17
The cheetahs have very little variation in their
population. This is due in part to an ice age
thousands of years ago which drastically reduced
their population and more recently, it is due to
poaching and habitat loss. The cheetahs loss of
variation occurred as a result of ________.

• 300 points

18
the bottleneck effect

• 300 points

19
Besides mutation, what else provides variation in
a population?

• 400 points

20
sexual reproduction

• 400 points

21
A horse and a donkey can mate to produce a mule.
The mule is sterile and cannot reproduce. Using
this example, explain that a horse and donkey are
NOT the same species.

• 500 points

22
To be the same specie the offspring must be
fertile

• 500 points

23
What is the raw material of natural selection?

• 100 points

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Variation

• 100 points

25
If a mutation introduces a new skin color in a
lizard population, which of the following would
determine if the frequency of that new phenotype
might increase

• 200 points

26
Fitness of the mutation for the environment.

• 200 points

27
If all of the alleles for a trait are equally
favorable in the environment, what happens to
natural selection for that trait?

• 300 points

28
The trait is not selected by natural selection.

• 300 points

29
If a cricket population is changing from curved
wings to flat wings, which wing shape should be
the fittest for the environment?

• 400 points

30
Flat wings

• 400 points

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Daily Double
32
According to fossil evidence, whales evolved from
4-legged ancestors. The modern baleen whale has
forelimbs, but inspection of its skeleton reveals
only tiny vestigial hind limbs. What is the best
explanation for this loss of hind limbs in the
baleen whale?
500 points
33
Random chance and genetic drift led to the
reduction in size of hind limbs.
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Structures that no longer serve their original
purpose in the body are called what?

• 100 points

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vestigial

• 100 points

36
Penguin feathers and eagle feathers are
structurally similar. Penguins need feathers for
warmth while eagles use them in flight. These
are _____________________structures.

• 200 points

37
homologous

• 200 points

38
Which of the following indicates a recent common
ancestor?

• homologous structures
• analogous structures
• c. flight

300 points
39
homologous structures

• 300 points

40
Molecular evidence in support of natural
selection includes

• 400 points

41
the universal code of DNA

• 400 points

42
According to the cladogram, ferns are most
closely related to?

• 500 points

43
Flowering plants

• 500 points

44
What is require of offspring if the parents are
to be considered to be the same specie ?

• 100 points

45
They must be fertile.

• 100 points

46
When a species includes organisms with a great
deal of variation, what happens to the chances of
survival after a catastrophe?

• 200 points

47
It improves the chances of survival.

• 200 points

48
Two species of lizard are separated by the
formation of a wide river. Even when the climate
changes and the river dries up, the two species
do not interbreed. This is ______________
isolation.

• 300 points

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geographical

• 300 points

50
The mating dance of the blue-footed booby creates
__________ isolation with other species of
birds.?

• 400 points

51
behavior

• 400 points

52
In order for speciation to occur, What isolation
MUST take place?

• 500 points

53
reproductive

• 500 points