- Dicotyledon
- Transpiration
- Water potential gradient
- On a hot day in the middle of a drought, what can you expect the leaves of a plant to
look like? Draw a diagram to describe your answer.
- List the environmental conditions that would result in the highest rate of transpiration.
- Name four defining characteristics of a dicotyledonous plant.
- In a short paragraph, explain how secondary thickening in a stem comes about.
- Name and briefly discuss the adaptation of leaves to minimise transpiration.
- Name the two main ways that water can travel through the parenchyma of the root.
- Explain the difference between cohesion and adhesion.
- Transpiration in plants is driven by:
a) mitosis
b) capillary action
c) osmosis
d) all of the above
- Stomata:
a) are found in plant roots
b) permit the intake of carbon dioxide
c) permit the intake of oxygen
d) all of the above
- Water can be lost by a plant through which process(es)?
a) evaporation
b) transpiration
c) condensation
d) A and B
- What environmental condition(s) always lead to an increase in transpiration rate in
each plant tested?
a) heat
b) wind
c) light
d) A and B
e) all of the above
- The average temperature of a region in 25 degrees C. If a plant were grown below 21
degrees C you would expect transpiration rates to
a) increase
b) decrease
c) stay the same
- Wind appears to increase the rate of transpiration in a plant. This is most likely due to
the fact that:
a) humidity increased
b) evaporation increased
c) stomata were forced to close
Chapter 6. Support and transport systems in plants 187
