-Non-vascular plants: Their dominant stage (gametophyte) lacks vascular tissues.
-Includes hornworts, mosses, and liverworts.
-Produce enclosed reproductive structures.
-Reproduce using spores, since they dont produce seeds or flowers.
-Show many similar characteristics as the first land plants.
-Includes hornworts, mosses, and liverworts.
-Produce enclosed reproductive structures.
-Reproduce using spores, since they dont produce seeds or flowers.
-Show many similar characteristics as the first land plants.
Lifecycle
1) A spore lands in a moist place and germinates to grow into a mass of tangled green filaments called a protonema.
2) The protonema forms rhizoids that grow into the ground and into the air.
3) The rhizoids grow into the green moss we are familiar with, which is the gametophyte and longest stage of the life cycle.
4) Gametes are formed in the reproductive structures at the tips of the gametophytes.
5) The female archegonium produces eggs and the male antheridium produces sperm.
6) The sperm and egg cells are haploid (n).
7) The sperm is released from the antheridium and travels to the archegonium, where it fertilizes the egg to make a diploid zygote (2n).
8) The zygote grows out of the gametophyte, depending on it for water and nutrients.
9) The zygote becomes a mature sporophyte that is shaped like a long stalk.
10) At the tip of the sporophyte is a capsule that contains haploid spores that are produced by mitosis.
11) Once the spores are produced and the capsule ripens, it opens and the spores are released, starting the cycle all over.
1) A spore lands in a moist place and germinates to grow into a mass of tangled green filaments called a protonema.
2) The protonema forms rhizoids that grow into the ground and into the air.
3) The rhizoids grow into the green moss we are familiar with, which is the gametophyte and longest stage of the life cycle.
4) Gametes are formed in the reproductive structures at the tips of the gametophytes.
5) The female archegonium produces eggs and the male antheridium produces sperm.
6) The sperm and egg cells are haploid (n).
7) The sperm is released from the antheridium and travels to the archegonium, where it fertilizes the egg to make a diploid zygote (2n).
8) The zygote grows out of the gametophyte, depending on it for water and nutrients.
9) The zygote becomes a mature sporophyte that is shaped like a long stalk.
10) At the tip of the sporophyte is a capsule that contains haploid spores that are produced by mitosis.
11) Once the spores are produced and the capsule ripens, it opens and the spores are released, starting the cycle all over.