Transport in Flowering Plants
137 questions· page 1 of 14
Which transverse section photomicrograph shows the position of the xylem and phloem in a non-woody dicotyledonous stem?
Options
Students set up apparatus to measure the uptake of water by a leafy shoot.
They recorded the position of the air bubble at the start. They observed the apparatus for 10 minutes, and recorded the distance travelled by the air bubble at one-minute intervals.
They then switched on a fan pointed towards the leafy shoot and recorded the distance travelled by the air bubble from the start, each minute, for another 10 minutes.
Which graph would they draw from their data?
Options
The diagrams show sections through a dicotyledonous root, stem and leaf.
The vascular tissues are labelled using numbers 1–6.
The ends of pieces of roots, stems and leaf stalks are placed in water containing a red dye.
After several hours, the coloured water has travelled along some of the vascular tissues.
Which vascular tissues appear red?
Options
| root | stem | leaf | |
|---|---|---|---|
| A | 1 | 3 | 6 |
| B | 1 | 4 | 5 |
| C | 2 | 4 | 6 |
| D | 2 | 3 | 5 |
Which graph shows the effect of light intensity on the rate of transpiration?
Options
The diagram shows a section through a leaf.
What are the functions of the parts labelled 1, 2, 3 and 4?
Options
| 1 | 2 | 3 | 4 | |
|---|---|---|---|---|
| A | gaseous exchange | transporting sucrose | transporting water | photosynthesis |
| B | gaseous exchange | transporting water | transporting sucrose | photosynthesis |
| C | photosynthesis | transporting sucrose | transporting water | gaseous exchange |
| D | photosynthesis | transporting water | transporting sucrose | gaseous exchange |
Which pathway is taken by water and mineral ions through a plant?
Options
A root hair cells → mesophyll cells → xylem → cortex cells
B root hair cells → cortex cells → phloem → mesophyll cells
C root hair cells → mesophyll cells → phloem → cortex cells
D root hair cells → cortex cells → xylem → mesophyll cells
A student investigated the rate of transpiration in a green plant. The plant was growing in soil in a pot.
The student watered the plant and then put a plastic bag around the pot, leaving the leaves of the plant outside the bag. She measured the mass of the plant in the pot at the start and repeated this every two hours for six hours.
The results of the investigation are shown.
| time of day | mass of pot and plant / |
|---|---|
| 09:00 | 1276 |
| 11:00 | 1270 |
| 13:00 | 1258 |
| 15:00 | 1252 |
What is the mean rate of transpiration over the six-hour period?
Options
A
B
C
D
The diagrams show what happens to rain when it falls on an area of forested land before and after houses are built.
What is the difference in the percentage of surface runoff before and after building the houses?
Options
A increases by 33%
B increases by 43%
C decreases to 43%
D decreases to 33%
Water moves from the soil to the atmosphere through a plant.
The water enters the plant through the root hair cells and moves into the root cortex.
Where does the water move into from the root cortex?
Options
A into the mesophyll cells
B into the phloem cells
C into the xylem vessels
D through the stomata
The graph shows the loss of water vapour from two different plants growing in identical conditions.
What is a possible reason for the difference in the volume of water vapour lost from the two plants?
Options
A Plant X has most of its stomata on the lower surfaces of its leaves.
B Plant Y has most of its stomata on the upper surfaces of its leaves.
C The surfaces of the mesophyll cells of plant X have a greater surface area.
D The surfaces of the mesophyll cells of plant Y have a greater surface area.