Transcript Moss and Fern Life Cycles Group 1: Seedless

Moss and Fern Life Cycles
Group 1: Seedless, Nonvascular Plants
• Live in moist
environments
– Need water to
reproduce
• Grow low to ground
(nonvascular)
• Lack true leaves
• Common pioneer
species
• Gametophyte most
common (dominant)
• Ex: Mosses,
liverworts, hornworts
Rain falls
Moss Life Cycle
Sperm swims from male to female gametophyte
Zygote created….sporophyte stage begins
Sporophyte releases spores
Spores grow into new gametophytes
sporophyte
Male
gametophyte
(with sperm)
.
Female
gametophyte
(with eggs)
Male
gametophyte
(with sperm)
Female
gametophyte
(with eggs)
Group 2: Seedless,
Vascular Plants
• Vascular system
– Taller growth
– Nutrient transportation
• Live in moist
environments
– swimming sperm
• Has primitive roots called
rhizoids
• Gametophyte stage
– Called Prothallus
– Creates egg and sperm
• Sporophyte stage
– Leaves called “Fronds”
– Spores created on underside
in clusters called “sori”
• Ex: Ferns, Club mosses,
Horsetails
Fern Frond
Underside of frond
1) Sporophyte (diploid stage) creates and releases haploid spores
Adult
Sporophyte
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ground
2) Haploid spores land in the soil
ground
3) From the haploid spores, gametophyte grows
Let’s zoom in
Fern gametophytes
are called a prothallus
ground
4) Sperm swim through water from the male parts (antheridium) to the female parts
(archegonia)…zygote created
Let’s zoom back out
zygo
egg
te
zygo
egg
te
5) Diploid sporophyte grows from the zygote
sporophyte
zygote
zygote
ground
6) Fiddle head uncurls….fronds open up
7) Cycle repeats……Haploid spores created and released
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.
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fiddlehead
frond
.
ground
.
Kobe Kuiz
1) Why do moss grow so low to the ground?
2) Which stage is the main stage of moss: sporophyte or
gametophyte?
3) How do moss reproduce?
4) What is the major difference between moss and ferns?
5) What are the leaves of ferns called?
6) What is needed for moss and ferns to reproduce?
7) Which stage is the main stage of ferns: sporophyte or
gametophyte?
8) What stage is created when sperm and egg fuse: sporophyte or
gametophyte?
9) Name the gametophytes of ferns.