Flashcards in Topic 6- Plant Structure and their Functions Deck (26):
Prevents water loss through transpiration
Less stomata for decreased water loss
Transparent and thin for more light to pass through to the palisade layer
Palisade mesophyll tissue...
Contains lots of chloroplasts to absorb the light energy which has passed through
Spongy mesophyll tissue...
Contains air spaces to increase rate of diffusion
Contains lots of stomata (see other revision card)
Stomata are found...
On the lower surface of a leaf
Stomata allow gaseous exchange which means...
Carbon dioxide (CO2) in for photosynthesis
Oxygen (02) out as a product of this reaction
Water vapour escapes through the stomata during...
When the guard cells are full of water...
The guard cells are turgid (swollen) and therefore the stomata opens
When the guard cell are not full of water and limp...
The guard cells are flaccid and the stomata close
Photosynthesis word equation
Carbon dioxide + Water > Glucose + Oxygen
Balanced photosynthesis equation
6CO2 + 6H2O > C6H12O6 + 6O2
Photosynthesis occurs inside the...
Chloroplasts which contains chlorophyll which absorbs light
Photosynthesis is an .... reaction
Endothermic reaction which means energy is TAKEN IN during the reaction
Phloem tubes transport...
Food substances, mainly sucrose
Phloem tube cells are...
Which are seen as green through a microscope
Phloem tube adaptations
Have small pores in the end walls to allow sucrose and food substances to flow through quicker
Phloem tubes transport in...
Both directions, up and down
Xylem tubes transport...
Water and mineral ions from root hair cells
Xylem tubes are...
Seen as brown down a microscope
Xylem tube adaptations
Hollow tubes with no end cell walls therefore water flow isn’t slowed down
Xylem tubes transport water and mineral ions...
Upwards from the root hair cells carried to the leaves via the roots and stem
Root hair cells are found...
On the surface of the roots
Root hair cell adaptations
Large surface area for absorbing water and mineral ions
Which are transported upwards from the root hair cells
Root hair cells absorb minerals...
By active transport, because there is a higher concentration of mineral ions in the root hair cells compared to the soil around