EBK LIFE: THE SCIENCE OF BIOLOGY
11th Edition
ISBN: 8220103935432
Author: Sadava
Publisher: MAC HIGHER
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Chapter 42.1, Problem 2R
Summary Introduction
To review:
The severity of negative impact of global climate change on a sexually and asexually reproducing species of animal.
Introduction:
Reproduction in animals can take place by two means—asexual and sexual. In asexual reproduction, the genetically similar offspring or clones of the parent organism is produced, whereas in sexual reproduction, genetically varied offspring are produced as they inherit half the number of genes from one parent and a half from the other one.
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Students have asked these similar questions
Why is sexual reproduction useful if only half the animals can produce offspring and two separate cells must be combined to form a third?
From an evolutionary standpoint, why is sexual reproduction advantageous for the continuation of a species?
All of the following are correct about asexual reproduction EXCEPT
a) it can create numerous offspring quickly
b) the offspring are genetically identical to the parent
c) it enables animals living in isolation to produce without a mate
d) it is advantageous when the environment is changing and the organisms is stressed.
Chapter 42 Solutions
EBK LIFE: THE SCIENCE OF BIOLOGY
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- Describe a situation in which asexual reproduction might be more likely than sexual reproductionarrow_forwardhow does sexual reproduction produce more complex offspring, produce a greater number of offspring, enhances the genetic variability, produce more evolutionary fit individual and Increases the survival rate of the species?arrow_forwardDescribe how genes are transmitted in sexually reproducingspeciesarrow_forward
- What are the evolutionary advantages for an organism to reproduce both asexually and sexually?arrow_forwardIf an organism reproduces very freely by asexual means, is there any advantage to its also reproducing sexually?arrow_forwardMost species reproduce sexually. Some species are entirely asexual, while others can reproduce in both modalities. a) Why is asexual reproduction so rare? b) What can we learn about the factors that maintain sexual reproduction from studying species that can reproduce both sexually and asexually?arrow_forward
- What is a likely evolutionary advantage of sexual reproduction over asexual reproduction?arrow_forwardAsexual reproduction passes on 100% of the parent's genes but it is relatively rare. What are the advantages of sexual vs asexual reproduction? In some cases, species are hermaphrodites to reduce the difficulty in finding mates. What is the difference between simultaneous and sequential hermaphrodites? Why is "selfing" relatively rare?arrow_forwardWhy are the offspring of a male and a hermaphrodite more variablethan the offspring of a self-reproducing hermaphrodite?arrow_forward
- As described in the Biology and Society section, some species (including some endangered species) have been shown to be capable of reproduction via parthenogenesis, without participation of a mate. What implications might this have on efforts to repopulate endangered species? What drawbacks might a parthenogenesis program have on the well-being of the species it targets?arrow_forwardbriefly describe one benefit an organism that uses asexual reproductionarrow_forwardWhy does sexual reproduction persist even though it requires moreenergy than asexual reproduction?arrow_forward
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