Typpes of plants Flashcards
(13 cards)
Plants adapted to conditions of low water availability
Xerophytes
Hydrophyte?
Grow fully or partially submerged in water
Mesophytes
Plants adapted to grow in adequate water supply and survive freezing weather
Examples of the 3 types of plants
H: Water lillie
M: Crop plants
X: Marram grass
Adaptations of xerophytes
Thick waxy cuticle
Sunken stomata
Hairs
Rolled leaves
Advantage of sunken stomata and hairs
Hairs trap water vapour, sunken , sunken reduces air movement
Both decrease humidity/ water potential gradient
Adaptations and explanations for cacti
Leaves reduced to stems tk decrease SA for transpiration
Succulent stems for water storage
Adaptations of hydrophytes 5
Poorly developed xylem
Stomata on top
Thin waxy cuticle
Large air spaces
Little lignified tissue
Why do hydrophytes have little lignified tissue
They are supported by water
Function of air spaces in hydrophytes 2
Reservoir for O2 and CO2
Increase buoyancy
Why are stomata on top on hydrophytes
To allow for gas exchange with he air
Why is the xylem poorly developed in hydrophytes
They have no need to the transport tissue as they are submerged in water
How do mesophytes survive in winter
Aerial, non woody plants die and underground organs e.g bulbs, survive dormant
