translocation and transportation

how to plant make their own sugars?

through photosynthesis

what structure is involved in translocation?

phloem

what are the pores’ function in the phloem cell?

it enables movement of cell sap which is a mixture of sugar and water

what can the cell sap be used for in the plant?

• stored for later use

• used directly for energy

what direction can phloem transport substances?

up and down

what are phloem cells made of?

dead phloem cells with no ends

wha tare the xylem cells strengthened with?

lignin

what is the role of the xylem?

to transport water and mineral ions from the roots to the rest of the plant.

what do we call the evaporation of water from the leaves?

Transpiration

what are the four main factors effecting the rate of the transpiration stream?

• light intensity

• temperature

• air flow

• humidity

how does light intensity affect the rate of transpiration?

if light intensity is increased, more photosynthesis is taking place, meaning more stomata are open leading to a higher rate of transpiration

how des temperature effect transpiration?

The warmer it is, the higher the rate of transpiration because the particles of water have more energy, meaning they are more likely to evaporate and diffuse out the stomata.

how does air flow effect transpiration?

when the air flow is high, the concentration gradient is kept high, increase the rate of transpiration

how does humidity effect the rate of transpiration?

the more humid the air there is a decrease in the rate of translocation and a reduction in the concentration gradient

how do root hair cells absorb water form the soil?

osmosis

how do root hair cells absorb mineral ions from the soil

active transport

what is transpiration?

the evaporation of water from the leaves