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Published byMelinda Lucy Carpenter Modified over 7 years ago
Moss and Fern Life Cycles
Group 1: Seedless, Nonvascular Plants Live in moist environments to reproduce Grow low to ground to retain moisture (nonvascular) Lack true leaves Common pioneer species during succession Gametophyte most common (dominant) Ex: Mosses, liverworts, hornworts
Moss Life Cycle
Haploid gametophytes 1)Moss gametophytes grow near the ground (haploid stage) 2) Through water, sperm from the male gametophyte will swim to the female gametophyte to create a diploid zygote 3) Diploid sporophyte will grow from zygote 4) Sporophyte will create and release haploid spores..... Diploid sporophyte egg male female zygo te
5) Haploid spores land and grow into new gametophytes..... ground Haploid gametophytes 6) The process repeats
..... sporophyte egg male female zygo te
Group 2: Seedless, Vascular Plants Vascular system allows –T–Taller growth –N–Nutrient transportation Live in moist environments –s–swimming sperm Gametophyte stage –M–Male gametophyte: makes sperm –F–Female gametophyte: makes eggs –S–Sperm swims to fertilize eggs Sporophyte stage –S–Spores released into air –S–Spores land and grow into gametophyte Ex: Ferns, Club mosses, Horsetails
Fern Life Cycle
Adult Sporophyte.... 1) Sporophyte creates and releases haploid spores ground
.... 2) Haploid spores land in the soil
ground 3) From the haploid spores, gametophyte grows in the soil Let’s zoom in Fern gametophytes are called a prothallus
4) Sperm swim through water from the male parts (antheridium) to the female parts (archegonia)…zygote created Let’s zoom back out egg zygo te
ground 5) Diploid sporophyte grows from the zygote sporophyte Fern gametophytes are called a prothallus
6) Fiddle head uncurls….fronds open up ground 7) Cycle repeats -- Haploid spores created and released.... fiddlehead frond
.... ground 2) Haploid spores land in the soil
ground 3) From the haploid spores, gametophyte (called the prothallus) grows in the soil Let’s zoom in
4) Sperm swim through water from the male antheridium to the female archegonia Let’s zoom back out egg zygo te
ground 5) Diploid sporophyte grows from the zygote sporophyte fiddlehead
6) Fiddlehead uncurls….fronds open up. ground 7) Cycle repeats....
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.
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