Campbell Biology (11th Edition)
Campbell Biology (11th Edition)
11th Edition
ISBN: 9780134093413
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Chapter 24.1, Problem 1CC

(a)

Summary Introduction

To identify: The species concept(s) that can be applied to sexual and asexual species both.

Concept introduction:

The word species has been defined differently on the basis of three main species concepts namely; Biological Species Concept, “Morphological species Concept”, and Ecological Species Concept. According to the “Biological species concept”, a group of population with interbreeding members to produce viable fertile offspring is called species. Human beings are one of the best examples of biological species concept as they belong to the same species. In the “morphological species concept”, the species can be differentiated by their body shapes and other structural features whereas; in the “ecological species concept” the species can be defined by their ecological niche.

(b)

Summary Introduction

To explain: The most useful concept to identify species in the field.

Concept introduction:

The word species has been defined differently on the basis of three main species concepts namely; Biological Species Concept, “Morphological species Concept”, and Ecological Species Concept. According to the “Biological species concept”, a group of population with interbreeding members to produce viable fertile offspring is called species. Human beings are one of the best examples of biological species concept as they belong to the same species. In the “morphological species concept”, the species can be differentiated by their body shapes and other structural features whereas; in the “ecological species concept” the species can be defined by their ecological niche.

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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?
How do these similarities and differences relate to the evolutionary relationships between these species?
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