Topic 6 - Plant Tissues Flashcards
How is the palisade mesophyll adapted
To absorb light efficiently
Packed with many chloroplast
Towards the upper surface of leaf
How is the palisade mesophyll arranged
Column shape and close together
How is the spongey mesophyll adapted
Packed loosely for gas exchange
Covered in a thin layer of water, gases dissolve in water as they move in and out
Allows co2 to diffuse in and o2 to diffuse out
How are the stomata adapted
Allow gases to diffuse in and out
Water is lost by the process of transpiration closing stomata prevents water loss
How is the epidermal tissue adapted
Helps protect leaf by preventing water loss and providing an extra layer between the inside and outside of leaf
What does the xylem transport
Water and minerals
What does the phloem transport
Sugars and amino acids
How are the xylem adapted
It loses its end walls so the xylem forms a continuous hollow tube
And does not require energy
How is the phloem adapted
Composed of tubes of elongated cells, cells sap moves through pores in the end walls
What is the definition of translocation
Is the movement of sugar produced in photosynthesis to all other parts of the plant for respiration and the other processes described above occurs in phloem cells
What is the definition of transpiration
When a plant opens up its stomata to let in co2 water on the surface of the cells of the spongey mesophyll and palisade mesophyll evaporates and diffuses out of the leaf
Where does transpiration happen
In the xylem
Where does translocation happen
In the phloem
