9. Label the sporangia, indusium, leaf, and spores in Figure 4 below. 01Figure 4. Cyrtomium leaf c.s., sorus l.s.10. Explain the mechanism of spore dispersal in ferns with sori11. In what way is this mechanical method of spore dispersal similar to that in thebryophytes?Photo by Carolyn AllingMost ferns produce only one kind of spore and are therefore homosporous. Upongermination, the spore, the first cell of the gametophytic generation, gives rise to a heartshaped, bisexual gametophyte, called a prothallus.12. What type of nuclear division produces the many celled gametophyte from a spore?Examine the fern gametophytes under the dissecting scope. Note the many rhizoidsemerging from the lower, or ventral, surface. Among the rhizoids you will find antheridia,some of which may contain sperm cells. Nearer the notch of the "heart" you will find thearchegonia. In order to visualize their shape in three dimensions, you will have to focus upand down on the archegonia.Examine the prepared slides of fern antheridia and archegonia.13. What locomotory structures are present on the sperm?14. At what stage in the life cycle are ferns dependent on free water?.After the sperm fertilizes the egg, the sporophyte develops. Examine the fern gametophyteunder the dissecting scope with the immature sporophyte attached.15. Is the attachment of the sporophyte to the gametophyte in ferns a transientsituation or is it a permanent situation as it is in bryophytes?95

ling 10. Explain the mechanism of spore dispersal in ferns with sori 11. In what way is this mechanical method of spore dispersal similar to that in the bryophytes? Most ferns produce only one kind of spore and are therefore homosporous. Upon germination, the spore, the first cell of the gametophytic generation, gives rise to a heart shaped, bisexual gametophyte, called a prothallus. 12. What type of nuclear division produces the many celled gametophyte from a spore?

ling 10. Explain the mechanism of spore dispersal in ferns with sori 11. In what way is this mechanical method of spore dispersal similar to that in the bryophytes? Most ferns produce only one kind of spore and are therefore homosporous. Upon germination, the spore, the first cell of the gametophytic generation, gives rise to a heart shaped, bisexual gametophyte, called a prothallus. 12. What type of nuclear division produces the many celled gametophyte from a spore?

Biology: The Unity and Diversity of Life (MindTap Course List)

14th Edition

ISBN:9781305073951

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Chapter29: Life Cycles Of Flowering Plants

Section: Chapter Questions

Problem 15SQ: Match the terms with the most suitable description. ____ ovule a. pollen tube together with its...

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Figure 25.14 Which of the following statements about the moss life cycle is false? The mature gametophyte is haploid. The sporophyte produces haploid spores. The calyptra buds to form a mature gametophyte. The zygote is housed in the venter.
The following structures are found on the underside of fern leaves and contain sporangia: sori rhizomes megaphylls microphylls
Figure 23.28 Which of the following statements about the Laminaria life cycle is false? In zoospores form in the sporangia. The sporophyte is the 2n plant. The gametophyte is diploid. Both the gametophyte and sporophyte stages are multicellular.
Match the terms appropriately. ____ ovule a. gamete-producing body ____ cuticle b. spore-producing body ____ gametophyte c. where eggs form ____ sporophyte d. underground stem ____ fruit e. mature ovary ____ endosperm f. nutritive tissue in seed ____ rhizome g. where fern spores form ____ sorus h.secreted waxy layer
Match the terms appropriately. _____ovule a. gamete-producing body _____cuticle b. spore-producing body _____gametophyte c. where eggs form _____sporophyte d underground stem _____fruit e. mature ovary _____endosperm f. nutritive tissue in seed _____rhizome g. where fern spores form _____sorus h. waxy layer
The dominant organism in fern is the sperm spore gamete sporophyte
Match the terms with the most suitable description. ____ ovule a. pollen tube together with its contents ____ receptacle b. consists of seven cells, one with two nuclei ____ double fertilization c. after fertilization, develops into a seed ____ anther d. embryonic shoot ____ plumule e. pollen sacs inside ____ mature female gametophyte f. swollen stem; base of flower ____ mature male gametophyte g. formation of zygote and first cell of endosperm
The male gametophyte of the moss looks identical to the female from the naked cye, but the photo below s. at 40x and thenat 100 x) shows that the tip contains the structures where make gametes are produced. Make a sketch of the slide at 100x and label the following structures: antheridial head, antheridium. sperms
The male gametophyte of the moss looks identical to the female from the naked eye, but the photo below (I.s. at 4x and then at 40 x) shows that the tip contains the structures where male gametes are produced.
4) Draw the moss gametophyte and sporophyte, and label the following structures: gametophyte male plant female plant foliage (bladelike structures) rhizoids sporophyte (stalk & capsule)
Label the diagram which features an illustration of a portion of the sporophyte of Selaginella with strobili, and a photomicrograph of the longitudinal section of a mature strobilus. Indicate whether each of the structure you identified is haploid (n) or diploid (2n)
Complete the following paragraph to describe the characteristics of liverworts and mosses. antheridia protonema rhizoids sexual gemmae roots archegonia fragmentation asexual 1999 binary fission gemmules thalli Reset Help Liverworts and mosses are examples of nonvascular plants. Liverworts such as Marchantia have a smooth upper surface, and a lower surface with that project into the soil. The smooth upper surface of the thallus of a liverwort contains groups of cells called cups that can produce new plant organisms asexually. During sexual reproduction in liverworts, flagellated sperm are produced by and eggs are produced by After fertilization, small sporophytes produce windblown spores. Typically, mosses can reproduce asexually by almost every part of the moss plant to produce During the life cycle of a moss, a its structure. This process allows will produce upright leafy thalli along The thalli of a moss produce antheridia and archegonia, which are involved in reproduction.