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Plants-Multicellular Eukaryotes that photosynthesize.
-Cell walls made of cellulose
Types of plants—Non vascular
1. Bryophytes—Mosses, liverworts, hornworts.
--Reproduction only in water
--No vascular tissue
--draw water only by osmosisVascular tissue
2. Seedless Vascular plants—ferns and their relatives
--Reproduce using spores
--Have vascular tissue to transport food and water
--Xylem-moves water through the plant--Phloem-moves food through the plant
spores
Xylem and phloem
Microscope break…• At this point, you will use the microscopes
to look at a cross section of a fern leaf, which includes the sorus, which is the spore producing part of a fern leaf.
• You will then look at a fern gametophyte (prothallium).
• Sketch each on low power and we will label when done.
Vascular plants
3. Gymnosperms– conifers, cykads, ginkgoes, gnetophytes
--reproduce by seeds—have no protective coat (naked seed).
.--includes pine, spruce, fir trees
--sperm from pollen fertilizes egg
Gymnosperms continued!
Pinecones (female) contain the seeds.----
Male cones contain the pollen----
Where are the different types of cones located on the tree?
4. Angiosperms—Flowering plants
--Have flowers which attract insects and birds for more efficient pollination.--have ovary—covers seed (fruit)
--animals may carry fruit to new locations—other dispersalmechanisms?
Diversity of Angiosperms
Two classes:
Comparison of monocotsand dicots.
Monocots—corn, lilly, grass, orchids, palms, etc.
Dicots—roses, clover, tomatoes,
daisies, etc.
Dicotyledonae (dicots)Monocotyledonae (monocots)
(Pg. 570)