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 26.3, Problem 3R
Summary Introduction
To review:
The reason as to why the life cycle of most diploid animals is not considered as examples of alternation of generations, despite having haploid stages (gametes).
Introduction:
Some plants,
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In Alternation of Generations Life Cycles, There Are Both Diploid and Haploid Multicellular Stages
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Triploid cells
haploid gametes
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Some 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?
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Life: The Science of Biology
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- Human haploid gametes (sperm and eggs) contain: a. 46 chromosomes, 46 chromatids b. 46 chromosomes, 23 chromatids c. 23 chromosomes, 46 chromatids d. 23 chromosomes, 23 chromatidsarrow_forwardWhich one of the following is a result of fertilization Restoration of the haploid number of chromosomes O Restoration of the diploid number of chromosomes the resulting zygote has triple number of gamete (ovum or sperm) The resulting zygote has indefinite number of chromosomesarrow_forwardCells that are ________ possess a single set of chromosomes diploid haploid somatic zygotesarrow_forward
- Eggs Sperm Sexual reproduction Zygote The process illustrated in this diagram is called sporulation gastrulation mitosis fertilization meiosisarrow_forwardIn asexual reproduction a diploid individual would produce which of the following O diploid offspring through mitosis O diploid offspring through melosis O haploid offspring through mitosis o haploid offspring through meiosis Question 4 A snake has a diploid number of chromosomes of 48. How many chromatids would be p diploid cell at the start of mciosis? 12 96arrow_forwardHigher organisms have resorted to sexual reproduction in spite of itscomplexity. Why?arrow_forward
- These organisms alternate between a multicellular haploid generation (or, phase) and a multicellular diploid generation (or, phase). Group of answer choices plants neither animals botharrow_forwardWhat features of meiosis are important in sexual reproduction? What features in mitosis is important for genetic continuityarrow_forwardQuestion 3 Review the variety of life cycle. This is a multiple answers question. Which statement is true about the life cycles? O In an animal life cycle, meiosis produces gametes (n). Gametes are the only haploid cells in animals In an animal life cycle, zygote divides by mitosis to develop into a multicellular organism. Plants and some algae exhibit an alternation of generations in their life cycles. O In the life cycles of plants and some algae, the diploid sporophyte, makes haploid spores by meiosis. O in the life cycles of plants and some algae, the diploid sporophyte, makes haploid spores by mitosis. O In most fungi and some protists, the only diploid stage is the single-celled zygote; there is no multicellular diploid stage O The haploid adult in fungi and plants produces gametes by mitosis.arrow_forward
- What is the term for when unfertilized gametes go through mitotic nuclear cell divisions followed by cytoplasmic divisions to produce daughter cells with an unreduced number of chromosomes? Group of answer choices Automixis Apomixis Syngamy Sexual reproductionarrow_forward(2) Absence of its natural predator in india (3) Its oxygen scavenging activities from water bodies VAT Both (1) and (2) 12. Find the odd one with respect to ploidy level (1) Sperm (2) Egg (3) Anthrozoid Ner Zygote / 13. Which one is haploid AAL CAMERA Shot by Sourndi bet p Marre 2021/05/28 07:28 (1)arrow_forwardWhy do asexual reproduction in animals reproduce faster than sexual reproduction? In which environment will reproduction be more effective, stable or predictable? Explain your answer in 3 sentences only. In which method has high rate of survival, sexual or asexual reproduction? Why?arrow_forward
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Reproduction: Crash Course Zoology #9; Author: CrashCourse;https://www.youtube.com/watch?v=poLyJDVjKlM;License: Standard youtube license