Getting ready Identify the following on the diagram: n Fertilization Gamete Gametophyte (haploid) Meiosis Mitosis Multicellular Sporophyte (diploid) Zygote 2n 2n
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- © Macmillan Learning Match each of the terms with the appropriate description. The descriptions may be used once, more than once, or not at all. sporophyte gametophyte spore sperm egg zygote Incorrect multicellular diploid multicellular diploid unicellular haploid unicellular haploid multicellular haploid multicellular diploid Answer Bank unicellular haploid multicellular haploid multicellular diploid unicellular diploidStudent Preparation Read text Chapter 16, pages 366-390. Figure 1: Alternation of Generations Mitosis Spores 00 -+-+ 1111 Meiosis One cell from Sporophyte undergoes meiosis Gametophytes Haploid multicellular individuals 1n 2n - 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 Zygote 3. Are any gemma cups containing gemmae present on your plant? 4. What is the function of gemmae?. 78 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 different from the branching pattern seen in higher plants? O 145x3fern 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…
- Mitosis of diploid cells Single-celled, diploid zygote Multicellular, diploid sporophyte Sperm Fertilization Haploid spores Mitosis of haploid cells Egg Meiosis Multicellular, haploid gametophyteMegasporocytes will eventually produce which of the following? pollen grain sporophytes male gametophytes female gametophytesFigure 26.8 At what stage dees the diploid zygote form? when the female cone begins to bud from the tree at fertilization when the seeds drop from the tree when the pollen tube begins to grow
- Figure 23.25 Which of the following statements about Paramecium sexual reproduction is false? The macronuclei are derived from micronuclei. Both mitosis and meiosis occur during sexual reproduction. The conjugate pair swaps macronuclei. Each parent produces four daughter cellsFigure 32.8 An embryo sac is missing the synergids. What specific impact would you expect this to have on fertilization? The pollen tube will be unable to form. The pollen tube will form but will not be guided toward the egg. Fertilization will not occur because the synergid is the egg. Fertilization will occur but the embryo will not be able to grow.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.
- Alternation of generations describes which of the following? The haploid form can be multicellular; the diploid form is unicellular The haploid form is unicellular; the diploid form can be multicellular Both the haploid and diploid forms can be multicellular Neither the haploid nor the diploid forms can be multicellular.Figure 26.15 If a flower lacked a megasporangium, what type of gamete would not form? If the flower lacked a microsporangium, what type of gamete would not form?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.