Gen Combo Ll Biology; Connect W/learnsmart Labs Access Card
4th Edition
ISBN: 9781259853197
Author: Robert Brooker
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 46.3, Problem 3EQ
Summary Introduction
To determine: The predictions related to the body weight of db and ob mice when they are parabiosed with one another.
Introduction: In 1970, a Canadian-American researcher, Douglas Coleman, performed a series of experiments for revealing a satiety factor in mammals. The researcher was interested in knowing the interesting facts about the regulation of body mass of animals. He used two mutant strains (db and ob) of mice and one wt (wild-type) mice during the experiment.
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5. The adaptive value of presaturation dispersal is
A)
ensures monogamy.
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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?*
nd 2
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The proportion of DDT-resistant mosquitoes in a population remains constant due to
O 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 intróduced to a rainforest. Over the next year, the
finches show a death rate of…
Q6.9. Consider the following hypothetical scenario: An ancestral species of duck had a varied diet that included
aquatic plants and terrestrial plants and insects. These ducks spent time on both land and water. Individuals of this
species varied in the amount of webbing in their feet, with some individuals having more webbing and some having
less. As many years went by, the environment changed such that the aquatic food sources were much more plentiful
than those on land. Many generations later, almost all ducks had more webbing on their feet. How is this best
explained?
Ducks with less webbing worked harder than ducks with more webbing to eat aquatic plants. The more they used their feet, the more
webbed their feet became, so they got enough food to survive and reproduce.
Due to chance mutations, all the ducks' feet in the next generation had more webbing. They were therefore able to eat aquatic plants
and get enough food to survive and reproduce.
Ducks with more webbing were better…
Chapter 46 Solutions
Gen Combo Ll Biology; Connect W/learnsmart Labs Access Card
Ch. 46.2 - Prob. 1CCCh. 46.2 - Prob. 1BCCh. 46.2 - Prob. 2CCCh. 46.3 - Prob. 1CCCh. 46.3 - Can the relationship between body size and...Ch. 46.3 - What observation led to the experiments conducted...Ch. 46.3 - CoreSKILL How did the experimental linking of the...Ch. 46.3 - Prob. 3EQCh. 46.4 - Prob. 1CCCh. 46 - Prob. 1TY
Ch. 46 - Gluconeogenesis a. occurs when the liver...Ch. 46 - Prob. 3TYCh. 46 - Prob. 4TYCh. 46 - Insulin primarily regulates the blood glucose...Ch. 46 - Prob. 6TYCh. 46 - Prob. 7TYCh. 46 - Prob. 8TYCh. 46 - Prob. 9TYCh. 46 - Prob. 10TYCh. 46 - Prob. 1CQCh. 46 - Prob. 2CQCh. 46 - Prob. 3CQCh. 46 - Prob. 1COQCh. 46 - Prob. 2COQ
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