Practise IB Biology SL 3.1.9 using exact SL questions on environmental control of stomata, leaf water loss and transpiration rate.
Water is one of the most abundant molecules on Earth. Living organisms must maintain homeostatic levels of water to survive.
Outline how environmental factors affect the rate of transpiration in plants.
a. transpiration is the evaporation of water from the stomata/openings of the plant leaf;
b. increase in humidity will decrease water loss/transpiration;
c. increase in temperature will increase water loss/transpiration;
d. increase in wind/ air movement will increase water loss/transpiration;
e. increase in light intensity will increase water loss/transpiration;
f. lack of water in soil causes stomates to close/transpiration to decrease;
Marking guidance:
Accept vice versa for these
statements
4
max