Gas Exchange in dicotyledonow plants

Question 1

Gas Exchange Surface

Answer 1

• surface of mesophyll cells
• cells inside leaf
• well adapted as have large SA

Question 2

Gas Movement

Answer 2

• gases move in and out through special pores in epidermis called stomata
• stomata can open to allow exchange of gases and close if plant is losing too much water
• guard cells control their opening and closing