Biology: The Unity and Diversity of Life
15th Edition
ISBN: 9780357093795
Author: STARR
Publisher: CENGAGE LEARNING (CUSTOM)
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Chapter 17, Problem 2DAA
Summary Introduction
To determine: The town with the highest percentage of poison-resistant wild rats
Introduction: Rodenticides are the pesticides that have a capability to kill the whole rodent species. Rodents have their own importance in the nature but sometimes require some control over their population, as they could transmit disease, destroy crops, and may cause ecological damage. Warfarin is a common anticoagulant that could be used as rodenticide to kill mice and rats.
After the discovery, warfarin has been widely used and later it resulted in development of species of warfarin-resistant mice and rats. Another recently developed one is bromadiolone, which is called as super-warfarin (second-generation warfarin) that has a greater ability to accumulate in the liver and kill the organism.
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The pesticide DDT was widely used in the 1940s as a method of insect control. In the late 1950s the first DDT-resistant mosquitoes were discovered, and eventually DDT-resistant mosquitoes were found globally. When DDT is used now, the development of DDT resistance in mosquito populations occurs in months rather than years.Which of the following best explains the observations concerning DDT resistance in mosquitoes?
a) The proportion of DDT-resistant mosquitoes in a population remains constant due to the metabolic costs of DDT utilization
b) Natural selection favors DDT-resistant mosquitoes that are already present in a population when DDT exposure occurs.
c) DDT is a chemical signal that delays normal reproductive cycles in many mosquito populations.
d) Competition for limited resources causes mosquitoes to migrate to geographical areas that have richer supplies of DDT.
Recall our discussions about the assumed relationships between oxpecker birds and cattle. Initial historical observations described them as mutualists. Based on the
exclusion experiments by Weeks et al. (2000), which of the following is the best explanation for the association between oxpeckers and their cow friends?
10-
E -5-
1st treatment
p 0.6
2nd treatment
p> 0.08
3rd treatment
p>0.07
O a. They are true mutualists because the presence of the birds is associated with increased wound size and there is no significant decline in tick infestations.
O b. They are true mutualists because the birds get the majority of their food in the form of eating the ectoparasites, like ticks, off the cattle and the cattle get the
benefit of a reduced parasite burden.
O c. They are not true mutualists because the oxpecker birds only cause harm to the cattle and no benefit.
O d. They are not true mutualists because although the birds do decrease the amount of ear wax build up which could enable better…
The pesticide DDT was widely used in the 1940s as a method of insect control. In
the late 1950s the first DDT-resistant mosquitoes were discovered, and
eventually DDT-resistant mosquitoes were found globally. When DDT is used
now, the development of DDT resistance in mosquito populations occurs in
months rather than years.Which of the following best explains the observations
concerning DDT resistance in mosquitoes? *
nd 2
school
The proportion of DDT-resistant mosquitoes in a population remains constant due to
the metabolic costs of DDT utilization
DDT is a chemical signal that delays normal reproductive cycles in many mosquito
populations.
Natural selection favors DDT-resistant mosquitoes that are already present in a
population when DDT exposure occurs.
Competition for limited resources causes mosquitoes to migrate to geographical
areas that have richer supplies of DDT.
A population of 1.492 finches is introduced to a rainforest. Over the next year, the
finches showa death rate of…
Chapter 17 Solutions
Biology: The Unity and Diversity of Life
Ch. 17 - Prob. 1DAACh. 17 - Prob. 2DAACh. 17 - Prob. 3DAACh. 17 - Prob. 4DAACh. 17 - Prob. 1SQCh. 17 - A neutral mutation _______ . a. has a pH of 7.0 b....Ch. 17 - Change in allele frequency of a population is...Ch. 17 - A wild population of pea plants has two alleles...Ch. 17 - Which of the following is not part of how we...Ch. 17 - Prob. 6SQ
Ch. 17 - The persistence of sickle-cell anemia in a...Ch. 17 - ___ tends to keep populations of a species similar...Ch. 17 - Which is required for a population to evolve? a....Ch. 17 - Prob. 10SQCh. 17 - After fire devastates all of the trees in a wide...Ch. 17 - True or false? Inbreeding can increase the...Ch. 17 - The difference between sympatric and parapatric...Ch. 17 - Prob. 14SQCh. 17 - Match the evolution concepts. ____ gene flow a....Ch. 17 - Species have traditionally been characterized as...Ch. 17 - Rama the cama, a llama-camel hybrid, was born in...Ch. 17 - Two species or antelope, one from Africa, the...Ch. 17 - Prob. 4CTCh. 17 - About 70 percent of flowering plants are...
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