Recall The nucleus contains DNA Long strands in

Diploid vs Haploid Most cells have a two sets of chromosomes, one from the

Diploid vs Haploid A haploid cell only has one set of chromosomes 1 n

Alternation of Generations • Plants have an alternation of generations in which the haploid

A Moss Life Cycle Key Haploid (n) Diploid (2 n) Male gametangium Sperm Gametophyte

A Moss Life Cycle Key Haploid (n) Diploid (2 n) Male gametangium Sperm Egg

A Moss Life Cycle Key Haploid (n) Diploid (2 n) Male gametangium Sperm Spores

http: //www. sumanasinc. com/webconte nt/animations/content/moss. html https: //www. youtube. com/watch? v=ac. Q_Ni 8 LNNU

Why is water important for mosses? How is this similar to algae living in

Mosses 1 Land plants Ancestral green alga Origin of land plants (about 470 mya)

Seedless Vascular Plants Ferns, Club Mosses, Horse Tail Contain Xylem Does the vascular system

Seedless Vascular Plants Live in moist/wet areas Needs water for reproduction (like bryophytes) Sporophyte

Based on your knowledge of the life cycle for moss, use the whiteboards and

A Fern Life Cycle Key Gametophyte plant (n) Haploid (n) Diploid (2 n) Male

Parts of the Fern – Draw this Rhizome – underground stems Fronds – fern

Uses of ferns Fiddleheads are edible Decoration Art Contributor to oil and natural gas

Uses of Moss Used to flavor scotch whiskey Fuel source Medicines Improves soil Peat

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Recall The nucleus contains DNA Long strands in shape of double helix - chromatin Multiple segments of the DNA, each is a chromosome

Diploid vs Haploid Most cells have a two sets of chromosomes, one from the mother and one from the father These 2 n cells are diploid cells (2 n) - Two sets

Diploid vs Haploid A haploid cell only has one set of chromosomes 1 n – one set The gametes are ‘sex cells’ and are haploid. A male produces the sperm A female produces the egg

Alternation of Generations • Plants have an alternation of generations in which the haploid and diploid stages are distinct, multicellular bodies. • The haploid generation of a plant produces gametes and is called the gametophyte. • The diploid generation produces spores and is called the sporophyte.

Draw the cycle

A Moss Life Cycle Key Haploid (n) Diploid (2 n) Male gametangium Sperm Gametophyte plants (n) Female gametangium Egg

A Moss Life Cycle Key Haploid (n) Diploid (2 n) Male gametangium Sperm Egg Female gametangium Gametophyte plants (n) Fertilization Zygote

A Moss Life Cycle Key Haploid (n) Diploid (2 n) Male gametangium Sperm Egg Female gametangium Gametophyte plants (n) Sporangium Sporophyte Gametophyte Fertilization Zygote

A Moss Life Cycle Key Haploid (n) Diploid (2 n) Male gametangium Sperm Spores (n) Egg Female gametangium Gametophyte plants (n) Sporangium Sporophyte Meiosis Gametophyte Fertilization Zygote

Figure 17. 3 -3

Figure 17. 3 -4

Figure 17. 3 -5

http: //www. sumanasinc. com/webconte nt/animations/content/moss. html https: //www. youtube. com/watch? v=ac. Q_Ni 8 LNNU

Why is water important for mosses? How is this similar to algae living in the water?

Mosses 1 Land plants Ancestral green alga Origin of land plants (about 470 mya) Nonvascular plants (bryophytes) Liverworts Hornworts 2 Monilophytes (ferns, horsetails, whisk ferns) Origin of seed plants 3 (about 360 mya) Angiosperms 500 450 400 Millions of years ago (mya) 350 300 0 Seed plants Gymnosperms Vascular plants Origin of vascular plants (about 425 mya) Seedless vascular plants Lycophytes (club mosses, spike mosses, quillworts)

Seedless Vascular Plants Ferns, Club Mosses, Horse Tail Contain Xylem Does the vascular system and phloem not contain seeds

Seedless Vascular Plants Live in moist/wet areas Needs water for reproduction (like bryophytes) Sporophyte is the dominant generation

Based on your knowledge of the life cycle for moss, use the whiteboards and try drawing the life cycle of the fern

A Moss Life Cycle Key Haploid (n) Diploid (2 n) Male gametangium Sperm Spores (n) Egg Female gametangium Gametophyte plants (n) Sporangium Sporophyte Meiosis Gametophyte Fertilization Zygote

Based on your knowledge of the life cycle for moss, use the whiteboards and try drawing the life cycle of the fern

A Fern Life Cycle Key Gametophyte plant (n) Haploid (n) Diploid (2 n) Male gametangium Sperm Female gametangium Egg

A Fern Life Cycle Key Gametophyte plant (n) Haploid (n) Diploid (2 n) Male gametangium Sperm Female gametangium Egg Fertilization Zygote

A Fern Life Cycle Key Gametophyte plant (n) Haploid (n) Diploid (2 n) Male gametangium Sperm Female gametangium Egg Mature sporophyte Fertilization Zygote New sporophyte growing from the gametophyte

A Fern Life Cycle Key Gametophyte plant (n) Haploid (n) Diploid (2 n) Male gametangium Spores Sperm Female gametangium Egg Meiosis Mature sporophyte Fertilization Zygote New sporophyte growing from the gametophyte

Parts of the Fern – Draw this Rhizome – underground stems Fronds – fern leaf Fiddlehead – early frond rolled up Leaflets – each of the blades of the frond Sori – cluster of sporangia

Uses of ferns Fiddleheads are edible Decoration Art Contributor to oil and natural gas

Uses of Moss Used to flavor scotch whiskey Fuel source Medicines Improves soil Peat moss