Flashcards in Theme 3 - Plants Deck (13)
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1
450 mya
Nonvascular bryophytes began to colonize water bank
2
425 mya
1st plants arrived on land
Developed vasculature
3
300 mya
Seed plants evolved
4
Prevent desiccation
Cuticle
5
Respiration
Stomata
6
Reproduction
Alternation of Generations
7
Locomotion
Roots
8
Cuticle
1
Prevents desiccation
Hydrophobic
Secreted by epidermal cells
9
Stomata
2
Controls respiration and transpiration
Controlled by guard cells (epidermal)
More on leaf underside
Found in non-vascular plants
Turgid GC=open
Flaccid GC=closed
10
Vasculature
3
Transports nutrients
Gives ability to grow tall
Angiosperms evolved vessels (have tracheids)
Gymnosperms and ferns have tracheids
11
Tracheids
5
Dead at maturity (associated withy xylem)
Lignin deposits in cell walls (secondary cell wall)
No perforations
Closely packed, elongated cells
12
Vessel elements
6
Associated with xylem
Shorter and wider
Walls have gaps in them
13