Biology: Life on Earth with Physiology Plus Mastering Biology with Pearson eText -- Access Card Package (11th Edition)
11th Edition
ISBN: 9780133910605
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: PEARSON
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Chapter 27.5, Problem 1CSR
Summary Introduction
To determine:
Whether the elephant seals, regardless of their abundance should be considered as potentially endangered in the foreseeable future or not.
Introduction:
The population of elephant seal experiences both density-independent as well as density-dependent environmental resistances. The elephant seals are the almost genetically identical species and any adverse changes can affect the entire population to a similar degree.
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Question 3
In Genetic decline, restoration and rescue of an isolated ungulate population (Poirier et al. 2018) which of
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Question 4
Which of the following is NOT an example of any type of coevolution discussed in lecture?
Milkweed evolves secondary metabolites in its sap to deter herbivores. Milkweed herbivores evolved cardinolide
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REQUIREMENTS FOR NATURAL SELECTION TO OCCUR:
17a. Assuming that both types of pom-poms are present in the population, what do you think
would happen to the pom-pom population if the black forest experienced a prolonged drought
so all the trees died and the habitat became red grassland?
17b. Next, think about an alternative scenario. Suppose that natural selection over many
generations had eliminated all the red pom-poms in the black forest habitat so only black pom-
poms survived. After that, a prolonged drought resulted in this habitat turning into a red
grassland. Would natural selection for pom-pom color occur? Why or why not?
17c. The above scenarios are showing that in order for natural selection to occur
must exist within a trait.
The Chatham Islands are about 850 kilometers off the coast of New Zealand. One species of bird living on the islands, the black robin (Petroica traversi), in 1980 there were only 5 individuals left. Currently, there are already 200 black robins living there: all from a single pair. Using the "fingerprint" method of blood cell DNA, it was proved that all the robins of this species are genetically identical according to the studied gene sequences. They thrive here today. Even 70 percent young survive. And on the continent, only 42% of young Petroica australis survive..
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Chapter 27 Solutions
Biology: Life on Earth with Physiology Plus Mastering Biology with Pearson eText -- Access Card Package (11th Edition)
Ch. 27.1 - Prob. 1CSCCh. 27.1 - Prob. 1CYLCh. 27.1 - Prob. 1HYEWCh. 27.1 - The Return of the Elephant Seals Female elephant...Ch. 27.1 - Prob. 2CYLCh. 27.1 - Prob. 3CYLCh. 27.2 - Prob. 1CSCCh. 27.2 - Prob. 1CYLCh. 27.2 - Prob. 1TCCh. 27.2 - Prob. 2CYL
Ch. 27.2 - What factors might make these population data...Ch. 27.2 - Prob. 3CYLCh. 27.2 - What benefits does mass emigration give to animals...Ch. 27.3 - Prob. 1CYLCh. 27.3 - Prob. 2CYLCh. 27.4 - describe the three types of spatial distribution...Ch. 27.5 - Prob. 1CSRCh. 27.5 - describe the advances that have allowed...Ch. 27.5 - Prob. 1TCCh. 27.5 - explain why rapid population growth continues...Ch. 27.5 - Prob. 2TCCh. 27.5 - Prob. 3CYLCh. 27.5 - Prob. 3TCCh. 27.5 - Prob. 4CYLCh. 27 - Research a developing country (such as Nigeria,...Ch. 27 - Prob. 1FIBCh. 27 - Prob. 1MCCh. 27 - Prob. 1RQCh. 27 - Prob. 2ACCh. 27 - The type of growth that occurs in a population...Ch. 27 - Prob. 2MCCh. 27 - Prob. 2RQCh. 27 - Prob. 3FIBCh. 27 - Prob. 3MCCh. 27 - Draw, name, and describe the properties of a...Ch. 27 - Prob. 4FIBCh. 27 - Prob. 4MCCh. 27 - Prob. 4RQCh. 27 - Prob. 5FIBCh. 27 - Prob. 5MCCh. 27 - What is logistic population growth? What is K?Ch. 27 - Prob. 6RQCh. 27 - Distinguish between populations showing concave...Ch. 27 - Explain why environmental resistance has not...Ch. 27 - Prob. 9RQCh. 27 - Prob. 10RQ
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