or d P How do moss leaves differ from the leaves of vascular plants? Where does meiosis take place in mosses? Where, in mosses, are zygotes and embryos formed?
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- How does a haplontic plant population maintain genetic diversity? Zygotes are produced by random fusion Gametes are created through meiosis Diploid spores undergo independent assortment during mitosis The zygote undergoes meiosis to generate a haploid sporophyte.Figure 24.14 Which of the following statements is true? A dikaryotic ascus that forms in the ascocarp undergoes karyogamy, meiosis, and mitosis to form eight ascospores. A diploid ascus that forms in the ascocarp undergoes karyogamy, meiosiis, and mitosis to form eight ascospores. A haploid zygote that forms in the ascocarp undergoes karyogamy, meiosiis, and mitosis to form eight ascospores. A dikaryotic ascus that forms in the ascocarp undergoes plasmogamy, meiosis, and mitosis to form eight ascospores.Some plants and algae alternate between haploid and diploid generations. Match the ploidy to each stage. Macmillan Learnin Mitosis Fertilization Mitosis Gametophyte Sporophyte Meiosis Mitosis n Answer Bank 2n EC Exp Fir Que
- In the moss Polytrichum commune, the haploidchromosome number is 7. A haploid male gametefuses with a haploid female gamete to form a diploid cell that divides and develops into the multicellular sporophyte. Cells of the sporophyte thenundergo meiosis to produce haploid cells calledspores. What is the probability that an individualspore will contain a set of chromosomes all ofwhich came from the male gamete?ogle.com/forms/d/e/1FAlpQLSfOIE2yjs-mgOqq5MJh2RLqXtN2zGgyL2YIJbr40XyrmPPeAg/formResponse A thin brown membrane in pine's seed is called: female gametophyte embryo seed coat nucellus The dominant stage in the life cycle of bryophytes is: * The gametophyte. The spore The fertilized egg The sporophytefern nrothalli.... antheridia and archegonia. Student Preparation Read text Chapter 16, pages 366-390. Figure 1: Alternation of Generations Mitosis Spores 60 - + - + Meiosis One cell from Sporophyte undergoes meiosis Gametophytes Haploid multicellular individuals 1n 2n saldy Quisetum, and at least one fern - Gamete + Gamete Fertilization Sporophyte Diploid multicellular individual 1. Are these thalli the gametopytes or sporophytes?_ 2. Are the thalli haploid or diploid? Mitosis Exercise I Marchantiophyta: The Liverworts Examine with the dissecting microscope the thalli of the relatively large, dichotomously branching gametophytes of Marchantia 3. Are any gemma cups containing gemmae present on your plant? 4. What is the function of gemmae?. 78 Zygote Examine carefully with the dissecting microscope the additional liverworts that are available. Note the dichotomous branching, the midrib-like region, and the air pores on the upper (dorsal) surface. 5. How is dichotomous branching…
- The leafy, green moss plants that are familiar are gametophytes, haploid plants. This is very different from flowering plants and other seed plants. Does a leafy green moss plant grow from a spore or from a fertilized egg? Does the moss plant have both paternal parent and maternal parent?What is the structure of theadult fern within which cellsundergoing meiosis can befound?Do the multicellular sex structures of plants give them any advantages over other organisms with unicellular sex structures?
- How are gametes formedin the pteridophyte life cycle,by mitosis or meiosis? What isthe type of meiosis that occursin pteridophytes?Are fern spores haploid or diploid? Are the spores proudced by meiosis or mitosis? Where are the spores produced?Draw a of alternation of generation of Mnium, a Genus of Mosses. Label all structures. Include both haploid and diploid structures. Draw the structures before fertilization and after fertilization. Indicate when fertilization occurs and how. Be sure to show the cycle from one generation to the next.