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M. hdusia (singular: indusium) (See text Figure 17-32, page 420). by specialized outgrowths of the leaf 6. Is the indusium diploid or haploid?. Obtain a small square of a fern leaf with one associated sorus. Scrape the sorus off of the leaf and onto a dry slide. It is ok if the sporangia separate from each other. Examine the sporangia under the microscope's low power objective. As the sporangia dry, they will begin to discharge their spores. 7. Do the spores belong to the sporophytic or the gametophytic generation? 8. What type of nuclear division (within the sporangia) gives rise to the spores?

M. hdusia (singular: indusium) (See text Figure 17-32, page 420). by specialized outgrowths of the leaf 6. Is the indusium diploid or haploid?. Obtain a small square of a fern leaf with one associated sorus. Scrape the sorus off of the leaf and onto a dry slide. It is ok if the sporangia separate from each other. Examine the sporangia under the microscope's low power objective. As the sporangia dry, they will begin to discharge their spores. 7. Do the spores belong to the sporophytic or the gametophytic generation? 8. What type of nuclear division (within the sporangia) gives rise to the spores?

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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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 sorus. Scrape the sorus off of the leaf and onto a dry slide. It is ok if the sporangia separate from each other. Examine the sporangia under the microscope's low power objective. As the sporangia dry, they will begin to discharge their spores. 7. Do the spores belong to the sporophytic or the gametophytic generation? 8. What type of nuclear division (within the sporangia) gives rise to the spores? Now examine the prepared slide that contains transverse sections of Cyrtomium leaf. The lower (abaxial) surface of each leaf section should have several sori on it, with each sorus containing many sporangia in various stages of development. Note that the sori are always associated with a vein and that they are protected by umbrellalike indusia (see text Figure 7-33, page 421). At maturity, each sporangium contains about 48 spores. The sporangia e stalked and each contains a special layer of cells with unevenly thickened walls called annulus, which is involved in spore dispersal. Find the annulus and the lip cells rough which initial tearing of the sporangium takes place during dehiscence. 94
Transcribed Image Text: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 sorus. Scrape the sorus off of the leaf and onto a dry slide. It is ok if the sporangia separate from each other. Examine the sporangia under the microscope's low power objective. As the sporangia dry, they will begin to discharge their spores. 7. Do the spores belong to the sporophytic or the gametophytic generation? 8. What type of nuclear division (within the sporangia) gives rise to the spores? Now examine the prepared slide that contains transverse sections of Cyrtomium leaf. The lower (abaxial) surface of each leaf section should have several sori on it, with each sorus containing many sporangia in various stages of development. Note that the sori are always associated with a vein and that they are protected by umbrellalike indusia (see text Figure 7-33, page 421). At maturity, each sporangium contains about 48 spores. The sporangia e stalked and each contains a special layer of cells with unevenly thickened walls called annulus, which is involved in spore dispersal. Find the annulus and the lip cells rough which initial tearing of the sporangium takes place during dehiscence. 94
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