Biology: The Dynamic Science (MindTap Course List)
Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 49, Problem 1TYK
Summary Introduction

Introduction:

Asexual reproduction is a type of reproduction that involves only one parent. The offspring is a clone of the parent and it is also referred to as clonal reproduction. The genetic composition of the parent and the offspring remains the same. It may take place through budding, fission, and fragmentation. The process of mitosis is key for cell division.

Expert Solution & Answer
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Answer to Problem 1TYK

Correct answer:

In sessile animals, asexual reproduction is preferred.

Explanation of Solution

Justification/explanation for the correct answer:

Option (b) is given as sessile animals. Sessile animals are those that cannot move from one place to another. These grow on a substrate and remain intact to it. Asexual reproduction is most successful in such animals, as these animals need to grow at a very fast rate. This increases their population and hence, protects them from predators. Hence, option (b) is correct.

Explanation for the incorrect answers:

Option (a) is given as changing environments. Animals reproducing asexually need a stable environment so that it does not stress the parent for food and other needs for reproduction. Also, changing environments will require animals to be genetically varied so that they can adapt to such an environment. So, it is an incorrect option.

Option (c) is given as densely settled population. A densely settled population will lead to diversity in genes upon reproduction. Also, in such a population, there is always competition for food and other resources that restricts asexual reproduction. So, it is an incorrect option.

Option (d) is given as land animals. Asexual reproduction does occur in land animals but land is subjected to changing environments. These variations in environments do not favor asexual reproduction that affects the diversity in characteristics of the species. So, it is an incorrect option.

Option (e) is given as genetically varied animals. These animals cannot undergo asexual reproduction as genetic variation does not occur in asexually reproducing animals. The genetic makeup of such animals remains the same for both the parent and the offspring. So, it is an incorrect option.

Hence, options (a), (c), (d), and (e) are incorrect.

Conclusion

Therefore, it can be concluded that asexual reproduction is the most successful in sessile animals. These animals are bound to move. They need to be higher in number in order to avoid predators and hence undergo asexual reproduction.

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Students have asked these similar questions
Which of the following is an advantage of asexual reproduction over sexual reproduction?   A. Asexual reproduction leads to offspring with high genetic diversity.   B. Asexual reproduction requires a partner.   C. The resulting offspring have no genetic diversity.   D. Asexual reproduction does not require a partner.
Which of the following correctly describes hermaphroditism?   A. It is an example of sexual reproduction because it involves a male and a female.   B. It is an example of asexual reproduction because only one individual needs to be involved.   C. It is an example of sexual reproduction because it involves fusion of two gametes.   D. It is an example of asexual reproduction because the offspring are genetically identical to the parent.
Is this true or false? a. Fertilization is followed by a cleavage, a period of rapid cell division without growth. b. From the process above, this results in the production of a large number of cells called blastomeres. c. In sexual reproduction, the offspring have the same combinations of genes as their parents.  d. Sequential hermaphroditism occurs when an animal is one sex during one phase of its lifecycle and the opposite sex during another phase
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