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Biology Chapter 8 : Topic 8
Factors Affecting Transpiration
1 / 15
Which environmental factor increases the rate of transpiration by increasing evaporation from leaf surfaces?
Reasoning: Higher temperature increases evaporation of water from leaves.
2 / 15
On a hot sunny day, the rate of transpiration is usually:
Reasoning: Increased temperature speeds up evaporation and transpiration.
3 / 15
Why does wind increase the rate of transpiration?
Reasoning: Wind removes the moist air surrounding leaves, maintaining a diffusion gradient.
4 / 15
Which condition would result in the highest rate of transpiration?
Reasoning: Both high temperature and wind increase transpiration.
5 / 15
Humidity refers to the amount of:
Reasoning: Humidity is the concentration of water vapour in the atmosphere.
6 / 15
When humidity is high, transpiration rate generally:
Reasoning: Moist air reduces the diffusion gradient for water vapour.
7 / 15
Which factor has the opposite effect on transpiration compared to temperature?
Reasoning: Higher humidity decreases transpiration, while higher temperature increases it.
8 / 15
A plant is placed in a windy area. What is the most likely effect?
Reasoning: Wind removes humid air from around the leaf surface.
9 / 15
Which environmental condition would slow down transpiration the most?
Reasoning: High humidity and still air reduce water loss.
10 / 15
Why does transpiration decrease on a humid day?
Reasoning: Less difference exists between water vapour inside and outside the leaf.
11 / 15
Which combination would cause the lowest rate of transpiration?
Reasoning: Both low temperature and high humidity reduce transpiration.
12 / 15
A farmer notices that plants lose water rapidly during dry windy weather. Which factors are responsible?
Reasoning: Wind and low humidity both increase transpiration.
13 / 15
If air around a leaf becomes saturated with water vapour, transpiration will:
Reasoning: Saturated air reduces the water vapour gradient.
14 / 15
Which factor directly removes the layer of moist air around leaves?
Reasoning: Wind blows away the humid boundary layer.
15 / 15
Which statement is correct?
Reasoning: Moist air slows the loss of water vapour from leaves.
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