Question 4. Now look at all the graphs. Which trait, beak length or wing length, has changed the most in the population over time? Support your answer by describing the change in proportion of the trait over time. Source: Wikimedia Commons/ putneymark Finch Habitat: Ground finches get their name because they get their food by gathering it from the ground. They eat small insects and the fruit and seeds of plants.

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Chapter12: Processes Of Evolution
Section: Chapter Questions
Problem 1DID
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EVOLUTION ASSESSMENT - FINCHES
Galápagos Ground Finches
Between 1973 and 1978, the population of ground finches (a type of small bird) on the Galápagos Islands
decreased. Scientists made observations of the population throughout that time period. They recorded
and graphed differences in the distribution of traits over time. The two sets of graphs below come from
the data they collected.
Beak Length for Ground Finches Observed in the Wet Seasons of 1973 and 1978
Wet 1973: all finches
# of finches
30
# of finches
25
20
15
10
5
0
30
25
20
15
10
5
12-01
0
$4.9
80-84
30.0-
11.5-11.9
Beak Length (mm)
Source: inquiryHub
35.0-39.9
40.0-44.9
12.5-12.9
13.0-13.4
13.5-13.9
14.0-
Wing Length for Ground Finches Observed in the Wet Seasons of 1973 and 1978
Wet 1973: all finches
65.0
Wing Length (mm)
Source: inquiryHub
70.0-74.9
# of finches
75.0-
30
25
# of finches
20
10
5
0
30
25
20
15
O
10
5
0
Wet 1978: all finches
7.0-74
7.5-7.9
80-8.4
85-80
9.0-94
9.5-9.9
10.0-1
30.0-34.9
10.5-10.9
11.0-11.4
11.5-11.9
12.0-12.4
12.5-
Beak Length (mm)
Source: inquiryHub
Wet 1978: all finches
Wing Length (mm)
Source: inquiryHub
13.0-13.4
13.5-13.9
14.0-
75.0-
Transcribed Image Text:EVOLUTION ASSESSMENT - FINCHES Galápagos Ground Finches Between 1973 and 1978, the population of ground finches (a type of small bird) on the Galápagos Islands decreased. Scientists made observations of the population throughout that time period. They recorded and graphed differences in the distribution of traits over time. The two sets of graphs below come from the data they collected. Beak Length for Ground Finches Observed in the Wet Seasons of 1973 and 1978 Wet 1973: all finches # of finches 30 # of finches 25 20 15 10 5 0 30 25 20 15 10 5 12-01 0 $4.9 80-84 30.0- 11.5-11.9 Beak Length (mm) Source: inquiryHub 35.0-39.9 40.0-44.9 12.5-12.9 13.0-13.4 13.5-13.9 14.0- Wing Length for Ground Finches Observed in the Wet Seasons of 1973 and 1978 Wet 1973: all finches 65.0 Wing Length (mm) Source: inquiryHub 70.0-74.9 # of finches 75.0- 30 25 # of finches 20 10 5 0 30 25 20 15 O 10 5 0 Wet 1978: all finches 7.0-74 7.5-7.9 80-8.4 85-80 9.0-94 9.5-9.9 10.0-1 30.0-34.9 10.5-10.9 11.0-11.4 11.5-11.9 12.0-12.4 12.5- Beak Length (mm) Source: inquiryHub Wet 1978: all finches Wing Length (mm) Source: inquiryHub 13.0-13.4 13.5-13.9 14.0- 75.0-
Question 4.
Now look at all the graphs. Which trait, beak length or wing length, has changed the most in the
population over time? Support your answer by describing the change in proportion of the trait over time.
Source: Wikimedia Commons/ putneymark
Finch Habitat: Ground finches get their
name because they get their food by
gathering it from the ground. They eat
small insects and the fruit and seeds of
plants.
Transcribed Image Text:Question 4. Now look at all the graphs. Which trait, beak length or wing length, has changed the most in the population over time? Support your answer by describing the change in proportion of the trait over time. Source: Wikimedia Commons/ putneymark Finch Habitat: Ground finches get their name because they get their food by gathering it from the ground. They eat small insects and the fruit and seeds of plants.
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