Concept explainers
To explain: Under which condition the rotifers and aphids are able to reproduce asexually.
Concept introduction: Living beings use two types of reproduction to produce offspring, one is asexual reproduction and the other is sexual reproduction. In asexual reproduction, only one organism is involved, and the offspring produced are genetically alike. Asexual reproduction occurs in many plants, for example spider plants, bacteria, hydra, yeast, and jellyfish. Sexual reproduction involves the fusion of male and female gametes. In this type of reproduction, two parents contribute genetic information to produce unique offspring. It occurs in most mammals, fish, reptiles, birds, and insects.
Explanation of Solution
Rotifers and aphids reproduce both by sexually and asexually or parthenogenetically. For asexual reproduction, stable environmental conditions are most favorable conditions. Under asexual reproduction, various processes like budding and binary fission take place. In this process, genetically identical offspring are produced. These genetically identical individuals prefer to live in a same stable environment that provides the offspring a better chance to survive.
To explain: Under which condition the rotifers and aphids are able to reproduce sexually.
Concept introduction: Living beings use two types of reproduction to produce offspring, one is asexual reproduction and the other is sexual reproduction. In asexual reproduction, only one organism is involved, and the offspring produced are genetically alike. Asexual reproduction occurs in many plants, for example spider plants, bacteria, hydra, yeast, and jellyfish. Sexual reproduction involves the fusion of male and female gametes. In this type of reproduction, two parents contribute genetic information to produce unique offspring. It occurs in most mammals, fish, reptiles, birds, and insects.
Explanation of Solution
Rotifers and aphids reproduce both by sexual reproduction and parthenogenesis. The continuous changing environmental conditions are more favorable for sexual reproduction. In autumn, aphids reproduce by sexual process and lay eggs. A change in photoperiod, temperature, and food quality and quantity causes female to reproduce parthenogenetically. Sexual reproduction takes place between males and females, which give rise to genetically different offspring. This changing environment is more suitable to reproduce genetically different offspring.
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Chapter 26 Solutions
Campbell Essential Biology with Physiology (6th Edition)
- 6) Classify the following as either Sexual or Asexual Reproduction. Give the specific type of asexual reproduction. a) A small piece of a cactus breaks off the plant, falls to the ground, and begins to grow. b) Pollen from a male poplar tree fertilizes sex cells on a female poplar tree. c) Two earthworms each produce sperm and eggs and fertilize each other. d) A flatworm is cut in half and grows into two flatworms.arrow_forwardAll 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.arrow_forwardWhat are the evolutionary advantages for an organism to reproduce both asexually and sexually?arrow_forward
- 1) Which statement below about asexual reproduction is FALSE? a) With asexual reproduction, offspring are genetically equivalent to the parent b) Asexual reproduction requires no partner c) Asexual reproduction requires meiosis d) Some organisms can reproduce both sexually and asexuallyarrow_forwardAsexual reproduction does exist with numerous unique adaptations, but it is normally sexual with both male and female sexes. a) Describe the different types of parthenogenesis and give an example of each type of insect. b) List and briefly describe four important elements that affect a female's ability to generate eggs and the amount of eggs that are oviposited.arrow_forwardDescribe the main differences between asexual and sexual reproduction. Why are both types of reproduction common?arrow_forward
- (a) Distinguish between asexual and sexual reproduction. Why isvegetativereproduction also considered as a type of asexual reproduction?(b) Which is better mode of reproduction : Sexual or Asexual? Why?arrow_forwardOne potential advantage of sexual reproduction is that offspring will have more genetic ______________ compared to offspring produced by asexual reproduction. Group of answer choices A)diversity B)identity C)similarity D)diplomacyarrow_forwardSome organisms—for example, certain fungi—reproduce asexually when the environment is favorable and sexually when the environment becomesunfavorable. What might be the evolutionary advantage of sexual reproduction with the associated process of meiosis during unfavorable conditions?arrow_forward
- Which of the following is a disadvantage of sexual reproduction? a.)Offspring can be reproduced more quickly than by sexual means b.)Two parents are required for making sex cells c.)Offspring are genetically different d.)Genetic diversity makes organism respond uniformly to environment changesarrow_forwardMany simple eukaryotes reproduce by asexual reproduction, using only mitosis. Assuming the environment is stable and the organism is well adapted to its environment, why is this a better form of reproduction for these organisms?arrow_forward25) Compared to asexual reproduction, the main advantage of sexual reproduction is that it: A) requires less energy B) increases the genetic diversity of the offspring C) can produce more complex offspring D) can produce a greater number of offspringarrow_forward
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