Researchers studied the effects of artificial selection on largemouth bass. The fish are bred in fisheries to have the desired trait of a high vulnerability rate (HVR) so they are easily caught by human anglers, and then released in artificial ponds and lakes that allow recreational fishing. Within three generations, a fishery can produce a population saturated with members that have the HVR trait in the study. Researchers compared the health of three groups of fish, as measured by the time it took them to recover after exercise: fish with HVR, fish with a low vulnerability rate (LVR), and a control group of wild fish. Each groups' cardiac output, heart rate, and stroke volume are represented in the graph.
Researchers studied the effects of artificial selection on largemouth bass. The fish are bred in fisheries to have the desired trait of a high vulnerability rate (HVR) so they are easily caught by human anglers, and then released in artificial ponds and lakes that allow recreational fishing. Within three generations, a fishery can produce a population saturated with members that have the HVR trait in the study. Researchers compared the health of three groups of fish, as measured by the time it took them to recover after exercise: fish with HVR, fish with a low vulnerability rate (LVR), and a control group of wild fish. Each groups' cardiac output, heart rate, and stroke volume are represented in the graph.
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Transcribed Image Text:Researchers studied the effects of artificial selection on largemouth bass. The fish are
bred in fisheries to have the desired trait of a high vulnerability rate (HVR) so they are
easily caught by human anglers, and then released in artificial ponds and lakes that allow
recreational fishing. Within three generations, a fishery can produce a population
saturated with members that have the HVR trait in the study. Researchers compared the
health of three groups of fish, as measured by the time it took them to recover after
exercise: fish with HVR, fish with a low vulnerability rate (LVR), and a control group of wild
fish.
Each groups' cardiac output, heart rate, and stroke volume are represented in the graph.
85
80
75
70
65
60
55
50
Control
LV
HV
Group of Fish
Does the practice of artificial selection in fisheries of largemouth bass for a greater
frequency of members with HVR affect the variability in their heart rate, and why?
No, artificial selection produces fish with the HVR trait that have little variability in their
cardiac output and heart rate recovery time.
Yes, fish bred through artificial selection will have the HVR trait and similar cardiac health to
fish bred through natural selection.
No, fish bred through artificial selection will have the HVR trait while those bred through
natural selection will have the HVR and LVR trait.
Yes, artificial selection produces fish with the LVR trait that have a lower recovery time and
lower cardiac health than fish bred through natural selection.
Cardiac Recovery Time (in min.)
Transcribed Image Text:Scientists conducted research to examine the evolutionary relationship between 10 bird
species and an alligator species. They isolated the amounts of the dinucleotides cytosine
and guanine found in the genomic DNA of each species. The graph shows the traditional
taxonomic groups of the bird species used and the average percentage of dinucleotides in
their DNA.
0.6
S 0.5
0.4
0.3
0.2
0.1
0.0
Flightless
Birds
Alligator
Non-perching
birds
Which of the following statements is best supported by the DNA evidence?
Gamebirds likely evolved after non-perching birds.
A bird's ability to fly may be linked to its dinucleotide percentage.
The dinucleotide percentages demonstrate coevolution of all species.
Non-perching birds are more similar genetically to alligators than flightless birds.
GC Content of the DNA (%)
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