Biology (MindTap Course List)
Biology (MindTap Course List)
11th Edition
ISBN: 9781337392938
Author: Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher: Cengage Learning
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Chapter 27, Problem 12TYU

Know and Comprehend

12. Which of the following statements about ferns is not true? (a) ferns have motile sperm cells that swim through water to the egg-containing archegonium (b) ferns are vascular plants (c) ferns are the most economically important group of bryophytes (d) the fern sporophyte consists of a rhizome, roots, and fronds (e) the diversity of ferns is greatest in the tropics

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Which of the following statements about ferns is not true? (a) ferns have motile sperm cells that swim through water to the egg-containing archegonium (b) ferns are vascular plants (c) ferns are the most economically important group of bryophytes (d) the fern sporophyte consists of a rhizome, roots, and fronds (e) the diversity of ferns is greatest in the tropics
Exercise II: Monilophyta Part A: Ferns The ferns differ from other seedless vascular plants in their possession of megaphylls, larger leaves with multiple veins. Examine the many living fern sporophytes. There is much diversity in megaphyll morphology. (See also text Figures 17-23, 24, 26, and 36, pages 413, 414, 416, and 424). Identify the frond, the rhizome, and the roots. Most fern fronds are compound, with the blade divided into separate leaflets. If young leaves are present, notice how they unfold. These young leaves are often called fiddleheads. Examine the leaves for the presence of sporangia. Notice if they are grouped together in sori (singular: sorus), distributed evenly over the lower surface of the leaf, or in other patterns. The sporangia of some species may be protected by specialized outgrowths of the leaf called indusia (singular: indusium) (See text Figure 17-32, page 420). 6. Is the indusium diploid or haploid?. Obtain a small square of a fern leaf with one associated…
Exercise II Bryophyta: The Mosses Examine with the dissecting microscope the mosses that are available. The "leafy" plants are the gametophytes and any elongated structures growing above them are the sporophytes. (See text Figure 16-27, page 385.) 15. Label the following in Figure 5 below: spores, zygote, protonema, gametophyte, meiosis, female, male, sporophyte, archegonia, sperm, sporangium. Capsule (n) 9 "Bud" Mature (2n) Female (n) 1n 2n Young sporophyte (2n) gametophyte (n) 82 Antheridia gametophyte (n) Embryo (2n) water E88 Female -gametophyte (n) sperm Fertilization (2n) Figure 5. Moss Life Cycle (drawn by Stephanie Preising, SCSU '20) Obtain a gametophyte and observe its symmetry, its leaf like structures, its axis (pseudo- stem), and is rhizoids. Some species of mosses are unisexual; others are bisexual. The moss gametophyte originates as budlike structures that develop from a protonema (plural: protonemata), a system of branching filaments derived from a germinating spore.

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Biology (MindTap Course List)

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