Post on 18-Dec-2014
description
Lesson 5.3
Ferns
Characteristics of FernsVascularNon floweringSpore producing, no seedsSpores found in sori on the back of the leaf
Characteristics of FernsVascularNon floweringSpore producing, no seedsSpores found in sori on the back of the leaf
Spores are produced by sporangia located in the sori
Characteristics of FernsVascularNon floweringSpore producing, no seedsSpores found in sori on the back of the leafSpores are produced by sporangi located in the sori
Spore - A small, single-celled reproductive body that is highly resistant to dry and heat and is capable of growing into a new organism.
Characteristics of FernsVascularNon floweringSpore producing, no seedsSpores found in sori on the back of the leafSpores are produced by sporangi located in the sori
Have rhizomes orstems that growhorizontallyUnderground Asexual reprod.
petiole
Characteristics of FernsVascularNon floweringSpore producing, no seedsSpores found in sori on the back of the leafSpores are produced by sporangi located in the soriHave rhizomes or stems that grow horizontally underground
Fronds = mature leaves of a fern
Fiddle heads = rolled up immature leaves of a fern
Life Cycle of a Fern
Has alternating generationsor two generations.
A. Sporophyte generation• What normally think of
as a fern• Produces spores• Last 3 – 7 years
Life Cycle of a Fern
Life Cycle of a Fern
Has alternating generations or two generations.A. Sporophyte generation
B.Gametophyte generation Spore develops into
prothallum (heart shaped structure)
Life Cycle of a FernHas alternating generations or two generations.A. Sporophyte generationB.Gametophyte generation
Prothallum makes the female gamete (egg) in the archegonium and the male gamete (sperm) in the antheridium Gametes are released and fertilization occurs forms sporophytes Last 3 – 7 weeks
sporophyte
Gametophyte
Other spore producing plants include:
Club mosses and horsetails