History for Chapter 30 Pre Class Assignment Item Chapter 30 Pre Class Assignment Score 100 Calculated Due Wednesday October 01 2014 11 59 PM Submitted Tuesday September 30 2014 2 52 PM Answers 1 In angiosperms a is contained in the anthers or ovaries and the consists of the rest of the plant sporophyte bryophyte gametophyte sporophyte sporophyte gametophyte bryophyte sporophyte 2 A haploid structure contains and a diploid structure contains one set of chromosomes 1n two sets of chromosomes 2n three sets of chromosomes 3n two sets of chromosomes 2n two sets of chromosomes 2n one set of chromosome 1n one set of chromosomes 1n three sets of chromosomes 3n 3 Which of the following organisms do not demonstrate a definitive alteration of generations in their life cycles Select all correct choices mosses angiosperms ferns gymnosperms Chara green algae 4 Which of the following is a component of the spore or zygote wall in mosses ferns gymnosperms and angiosperms and helps prevent the desiccation of these structures Select all correct choices sporangium sporopollenin chitin peptidoglycan sporangia Spores gametes zygotes Gametes spores zygotes Zygotes spores gametes Spores zygotes gametes Gametes zygotes spores Pg absorbs green light Pr absorbs red light Pfr absorbs far red light Pb absorbs blue light 5 are defined as haploid 1n cells that can form gametophytes Gametophytes in turn produce either haploid 1n male or female that can fuse to form diploid 2n 6 Which of the following forms of phytochrome promotes seed germination i e is active Select all correct choices 7 Alternation of generations is thought to have evolved in response to the challenges of reproducing on land How does the diploid multicellular generation enhance the ability of bryophytes such as mosses to reproduce on land It amplifies the number of cells undergoing meiosis and elevates them above the rest of the plant increasing the likelihood that fertilization leads to the successful dispersal of offspring It increases the number of gametes that can be formed increasing the likelihood of cross fertilization It stimulates the growth of the gametophyte generation by elevating photosynthetic surfaces above the ground It allows meiosis to occur as the first division following fertilization 8 Match each of the following terms with the appropriate description multicellular haploid unicellular haploid multicellular diploid or unicellular diploid The descriptions may be used once more than once or not at all c d a a a b 1 sporophyte 2 gametophyte 3 spore 4 sperm 5 egg 6 zygote a unicellular haploid b unicellular diploid c multicellular diploid d multicellular haploid 9 Phytochrome prevents seeds of some plants from germinating when they are in deep shade by the absorption of far red wavelengths by chlorophyll the absorption of red wavelengths by Pr the absorption of far red wavelengths by Pfr the slow dark conversion of Pfr to Pr the slow dark conversion of Pr to Pfr 10 True or false The same amount of energy is allocated to pollen production in angiosperms and gymnosperms true false Close
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