Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Textbook Question
Chapter 17, Problem 2FIB
Fill in the following with the appropriate isolating mechanism: Occurs when members of two populations have different courtship behaviors: ________; occurs when hybrid offspring fail to survive to reproduce: __________; occurs when members of two populations have different breeding seasons: ___________; occurs when sperm from one species fails to fertilize the eggs of another species: _____________; occurs when the sexual organs of two species are incompatible: ______________.
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Students have asked these similar questions
In most species containing individuals that are either male or female, the proportion of males and
females changes over time.
This graph shows shifting male female ratios in a wasp population over 10years.
Based on the data shown in the graph, select the statements that describe what happens whenever
one sex becomes rare or common
Percent male or female
100%
80%
60%-
40%
20%
0
Proportion of male and female wasps in a
population over a 10-year period
1
2
3
4
5 6 7
Year
Males • Females
8 9 10
When one sex becomes either more rare or more common, parents produce an equal number of sons and
daughters. The sex ratio returns to an equal number of males and females.
When one sex becomes rare, the other sex becomes common due to random fluctuations in the production of
male and female offspring. The fitness of the parents is not affected.
When one sex becomes rare, parents producing that sex have higher fitness due to a higher probability of
mating success in their offspring. The rare sex…
ADJUST
Negative assortative mating means that organisms choose mates that are different
from themselves. If negative assortive mating occurs in a population, what would
expect to happen to genotype frequency over generations?
O a) Frequency of the heterozygous genotype will increase.
b) Frequency of the homozygous genotypes will decrease.
O c) Frequency of the homozygous genotypes will increase.
O d) Both A and B
AUTO
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Instructions:
From the list below, select the type of reproductive barrier used to maintain species for each of
the provided examples. Be aware, some barriers may not be used at all and others may be used
more than once. Do not make assumptions, read each example carefully.
Hybrid Inviability
Hybrid Infertility
Spatial
Behavioral
Mechanical
Temporal
Gamete Incompability
Hybrid Breakdown
EXAMPLE
BARRIER
Two mules mate but never produce
offspring
Lions (Africa) and tigers (Asia) in the wild
An owl (active at night) and a blue jay
(active during the day)
Why a plant cannot fertilize itself
One fish species attracts a mate by humming
and a second species by creating an patch of
seaweed
A goat and a sheep reproduce but the
embryo never develops
The reproductive openings of one species
are 3 mm apart but in a second species the
are 7 mm apart
Chapter 17 Solutions
Biology
Ch. 17.1 - One way to determine the number of species on...Ch. 17.1 - Prob. 1TCCh. 17.1 - The tiny frog paedophryne amauensis was discovered...Ch. 17.1 - describe how biologists define species and explain...Ch. 17.1 - describe the biological species concept and...Ch. 17.1 - list some reasons why it can be hard to tell...Ch. 17.2 - describe the main types of premating and...Ch. 17.2 - provide examples of each type of mechanism?Ch. 17.3 - Make a list of events or processes that could...Ch. 17.3 - How might conservation scientists use the map...
Ch. 17.3 - It is not surprising that the forests of New...Ch. 17.3 - Prob. 3TCCh. 17.3 - Prob. 4TCCh. 17.3 - Prob. 5TCCh. 17.3 - One possible explanation for the distinctive...Ch. 17.3 - describe the two general steps that are required...Ch. 17.3 - explain the difference between allopatric and...Ch. 17.3 - explain adaptive radiation and describe the...Ch. 17.3 - interpret an evolutionary tree diagram?Ch. 17.4 - If specialization puts a species at risk for...Ch. 17.4 - Prob. 1CTCh. 17.4 - describe the main causes of extinction?Ch. 17.4 - Prob. 2CYLCh. 17.4 - Given that genetic isolation is the first step in...Ch. 17 - The biological species concept is difficult or...Ch. 17 - Which of the following does not describe a...Ch. 17 - All instances of speciation require a. genetic...Ch. 17 - Analysis of Rhagoletis fly populations in North...Ch. 17 - In the initial phase of allopatric speciation,...Ch. 17 - A species is a group of ________ that evolves...Ch. 17 - Fill in the following with the appropriate...Ch. 17 - Formation of a new species occurs when two...Ch. 17 - The process by which many new species arise in a...Ch. 17 - A species may be at higher risk of extinction if...Ch. 17 - Define the following terms: species, speciation,...Ch. 17 - Many of the oak tree species in central and...Ch. 17 - Review the material on the possibility of...Ch. 17 - A drug called colchicine prevents cell division...Ch. 17 - What are the two major types of reproductive...Ch. 17 - It is difficult to perform experiments that test...
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