Exam 4 Ch. 18 Flashcards
What is the ancestor to land plants
A form of freshwater green algae
5 Evolutionary events of land plants
Embryo Protection Vascular Tissue Megaphylls Seeds Flowers
When Did Embryo Protection Start
With Mosses
When did Vascular Tissue Start
Lycophytes
When did Megaphylls Start
With Ferns
Reason for vascular tissue
to transport water, and nutrients
Reason for megaphylls
Increases the amount of photosynthesis as well as amount of carbohydrates produced
Reasons for flowers
Reproductive structure to attract pollinators and give rise to fruits
Sporophyte
Diploid
Produces haploid spores by meiosis
Gametophyte
Haploid
Gametes fuse to form diploid sporophyte
Mosses
No true roots, stems or leaves
Swimming sperm
Short Height
Spores
Lycophytes
Vascular Tissue
Roots (horizontal)
Spores
Ferns
Megaphylls Vascular Tissue Swimming Sperm Tall Height Spores
Gymnosperm
Seeds (Cones)
Pollen Grain
Angiosperm
Covered Seeds Flowers Pollen Depend on Bees Fruit
How do Moss Reproduce
Sex cells must swim from on plant to another
Spores are spread by wind or human/animal interaction
How do Ferns Reproduce
Sex cells swim from plant to plant
Independent gametophyte
Spread by wind or human/animal interaction
How do Gymnosperms reproduce
Use Cones for reproduction
MAle cones produce pollen that blows in the wind
Female cones contain seeds
How do angiosperms reproduce
Pollen transfered from plant to plant by bees, wind, or human interaction
Seed develops inside fruit and utilized animals to spread them.
