Identify the set of conditions under which transpiration would occur at the slowest rate.
|
Humidity |
Temperature |
Air movement |
Light intensity |
|
| A |
Low |
Low |
Low |
Low |
| B |
High |
Low |
Low |
Low |
| C |
High |
High |
Low |
Low |
| D |
High |
Low |
High |
Low |
When a very narrow glass tube known as a capillary tube is dipped into water, water can flow up the tube despite the opposing force of gravity.
What is this model demonstrating?
Translocation
A hydrostatic pressure gradient
Cohesion between water molecules
Adhesion between water molecules
The following steps describe the process of transpiration.
What is the correct order of the steps?
III → II → IV → I
III → I → IV → II
I → III → IV → II
I → IV → III → II
Which of the following relates to xylem vessels?
I only
II and III only
I, II and III
III and IV only
A student drew a diagrammatic representation of a transverse section of a plant stem based on what they saw using a light microscope.
Identify the correct labels required for the drawing above.
|
I |
II |
III |
IV |
V |
|
| A |
Vascular bundle |
Pith |
Phloem |
Cambium |
Xylem |
| B |
Phloem |
Xylem |
Vascular bundle |
Cambium |
Pith |
| C |
Vascular bundle |
Xylem |
Pith |
Cambium |
Phloem |
| D |
Vascular bundle |
Cambium |
Pith |
Xylem |
Phloem |
Identify which of the adaptations below is not found amongst the group of plants known as xerophytes.
Having long hairs on their surface, so air moisture is absorbed at night
Having reduced leaves in the form of spines, so the surface area for transpiration is reduced
Having reduced numbers of stomata, so there are fewer pores through which water can be lost
Having hinge cells that shrink when flaccid, so the leaves roll up
When water is taken up by roots, what process is responsible for this and what is the cause behind this process?
|
Process |
Cause |
|
| A |
Cohesion |
The concentration of solutes in the soil is higher than in the roots |
| B |
Cohesion |
The concentration of solutes in the soil is lower than in the roots |
| C |
Osmosis |
The concentration of solutes in the soil is higher than in the roots |
| D |
Osmosis |
The concentration of solutes in the soil is lower than in the roots |
What does a potometer measure?
The rate of photosynthesis of a plant
The rate of water uptake of a plant
The rate of respiration of a plant
The rate of transpiration of a plant
Certain environmental factors can affect the rate of transpiration in plants. The effect of one environmental factor on transpiration rate is shown in the graph below.
Identify the environmental factor that is having this effect on transpiration rate.
Temperature
Humidity
Air movement
Light intensity
Identify the process by which mineral ions in soil move towards the root cell membrane.
Translocation
Transport through proteins known as protein pumps
Osmosis
Mass flow of water
