plant transport

Question 1

factors affecting transpiration

Answer 1

temperature (too little or too much)

Humidity (decreases rate of transpiration and decreases diffusion gradient)

Wind / air movement (increases diffusion gradient, rate of diffusion will increase, increases rate of transpiration)

Light intensity (will increase until a certain point)

water supply (no photosynthesis will take place because the stomata will close)

Question 2

diffusion up xylem

Answer 2

water passively transported into root hair and then into the xylem. there is a pressure difference within the xylem and outside, this force the nutrients and water up. With the use of cohesion and adhesion the water makes its way up the xylem and around the plant. factors affecting could be pressure, temperature, water supply, nutrients supply

Question 3

translocation down the phloem

Answer 3

sucrose actively transported into phloem with water following (osmosis) the sucrose then is transported down the phloem (a difference of pressure created, with sap following), the water again following. The sap is stopped by the sieve plates and the sucrose is then transported into roots

Question 4

adaptions for photosynthesis

Answer 4

flat (large surface area to volume ration)
thin (easy gaseous exchange)
Green chlorophyll (absorb sunlight)
veins (support and transports of substances)

epidermal cells are transparent
vascular bundles
stomata (gaseous exchange)
vertically tightly packed palisade mesophyll
spongy mesophyll (gaseous travel and exchange)