Theme 3 - Plants Flashcards Preview

Biology 371 > Theme 3 - Plants > Flashcards

Flashcards in Theme 3 - Plants Deck (13)
Loading flashcards...
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

Root System

4
Lignified vascular tissue underground
Nonvascular plants have rhizoids
Anchoring and water collection