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.

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Examine under the microscope's low power lens prepared slides containing Mnium
antheridial and archegonial heads. Mnium is a unisexual moss. Find an antheridium and
adjacent sterile hairs, the paraphyses. Note the stalk, sterile jacket layer, and
spermatogenous tissue.
16. Label the antheridia and paraphyses in Figure 6 below.
Figure 6. Mnium antheridial head l.s.
Photo by Carolyn Alling
tog
uv jeom en al doin
Transcribed Image Text:Examine under the microscope's low power lens prepared slides containing Mnium antheridial and archegonial heads. Mnium is a unisexual moss. Find an antheridium and adjacent sterile hairs, the paraphyses. Note the stalk, sterile jacket layer, and spermatogenous tissue. 16. Label the antheridia and paraphyses in Figure 6 below. Figure 6. Mnium antheridial head l.s. Photo by Carolyn Alling tog uv jeom en al doin
Exercise II Bryophyta: The Mosses de
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)
Mature
(2n)
Female
(n)
1n
2n
Young
sporophyte
(2n)
gametophyte
(n) Antheridia
gametophyte
(n)
82
Embryo (2n)
water
Egg
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.
Transcribed Image Text:Exercise II Bryophyta: The Mosses de 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) Mature (2n) Female (n) 1n 2n Young sporophyte (2n) gametophyte (n) Antheridia gametophyte (n) 82 Embryo (2n) water Egg 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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