Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 11.4, Problem 4R
Summary Introduction
To review:
The diagram showing both the diplontic and haplontic life cycles, and the haploid and diploid generations.
Introduction:
The life cycle of complex organisms involves sexual reproduction. In sexual reproduction, the ploidy changes. This means that the haploid and diploid stages are involved alternatively in the life cycle of many organisms. The life cycles are generally divided into three main categories, the diplontic and haplontic life cycle, and alternation of generation.
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Describe the life cycle of Funaria emphasising the diploid and haploid stages.
After plasmogamy has occurred, many molds (Mucoromycetes) exist in a heterokaryotic stage for up to centuries at a time. What occurs at the immediate end of this stage?
The nuclei fuse in a process called karyogamy.
The hyphae fuse in a process called karyogamy.
Diploid spores are produced in various spore-producing structures.
A haploid zygote is formed that becomes multicellular through repeated rounds of mitosis.
Which statement about life cycles with a dikaryon stage is false?
A zygosporangium results from the fusion of two coenocytic hyphae.
In effect, the dikaryon is neither diploid nor haploid.
Dikaryotic hyphae often have characteristics that are different from those of their n or 2n products.
The only true diploid structure is the zygote.
There are no gamete cells, only gamete nuclei.
Chapter 11 Solutions
Life: The Science of Biology
Ch. 11.1 - Prob. 1RCh. 11.1 - Prob. 2RCh. 11.1 - Prob. 3RCh. 11.2 - Prob. 1RCh. 11.2 - Prob. 2RCh. 11.2 - Prob. 3RCh. 11.2 - Prob. 4RCh. 11.3 - Prob. 1RCh. 11.3 - Prob. 2RCh. 11.3 - Prob. 3R
Ch. 11.3 - Prob. 4RCh. 11.3 - Prob. 5RCh. 11.4 - Prob. 1RCh. 11.4 - Prob. 2RCh. 11.4 - Prob. 3RCh. 11.4 - Prob. 4RCh. 11.5 - Prob. 1RCh. 11.5 - Prob. 2RCh. 11.5 - Prob. 3RCh. 11.5 - Prob. 4RCh. 11.6 - Prob. 1RCh. 11.6 - Prob. 2RCh. 11.6 - Prob. 3RCh. 11.7 - Prob. 1RCh. 11.7 - Prob. 2RCh. 11.7 - Prob. 3R
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- The life cycle of Funaria is called diplo-haplontic. Give reason.arrow_forwardWhen the Ascomycetes fungus reproduces sexually, mating type A fungi cross fertilize mating type a fungi. The resulting zygotes undergo meiotic and then mitotic division to produce asci with eight ascospores. The ascospores in the asci are ordered and reflect the position of the parental nuclei in the zygote. Use the passage to answer the question. How is the life cycle of Ascomycetes different from that of humans? A. Haploid cells undergo meiosis. B. Haploid cells undergo mitosis. C. Diploid cells undergo meiosis. D. Diploid cells undergo mitosis.arrow_forwardCompare the Venn diagram of sexual reproduction and asexual reproduction in plants. Where in the diagram would you add identical to parent A)a B)b C)c D)darrow_forward
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