Campbell Biology in Focus
Campbell Biology in Focus
3rd Edition
ISBN: 9780134710679
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Rebecca Orr
Publisher: PEARSON
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Chapter 22.1, Problem 1CC

(a)

Summary Introduction

To determine:

The species concept that could be applied to both sexual and asexual species

Introduction:

Species are the part of a population that shares similar traits with each other. They have the potential to interbreed and produce viable offsprings in turn. The four different types of species concept are: the typological species concept, the biological species concept, the evolutionary species concept, and the recognition species.

(b)

Summary Introduction

To determine:

The most useful concept for identifying species in the field.

Introduction:

Species are the part of a population that shares similar traits with each other. They have the potential to interbreed and produce viable offsprings in turn. The four different types of species concept are: the typological species concept, the biological species concept, the evolutionary species concept, and the recognition species.

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(a) Which species concept(s) could you apply to bothasexual and sexual species? (b) Which would be mostuseful for identifying species in the field? Explain.
Scientists studying reproduction compared three closely related species of bagworm moths. The reproductive methods for these species are given in the table. Which of the following research questions would provide additional information about the population level impacts of meiosis and sexual reproduction? A - How do the number of D. charlottae offspring compare with the number of S. rupicolella offspring? B - Do D. charlottae and S. rupicolella populations express greater genetic diversity than D. fennicella populations? C - Are the offspring of D. fennicella genetically unique compared to the offspring of D. charlottae and S. rupicolella? D - Does crossing-over in D. fennicella result in increased genetic variation compared to D. charlottae and S. rupicolella?
Enumerate and give at least 5 unique mechanisms employed by organisms in order to determine the sex of the offspring. In each case, give an example of a species which represent such a scheme of producing sex(y) descendants. Put reference Mechanism Example 1   2   3   4   5   What evolutionary forces drive the turnover of these sex determination mechanisms?
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