Plant Nutrition
199 questions· page 1 of 20
The diagram shows a transverse section through a leaf.
In which parts of the leaf can photosynthesis take place?
Options
A K and L
B E and F
C G and M
D H and J
Students investigated the rate of photosynthesis at different light intensities. They counted the number of oxygen bubbles released per minute by a submerged aquatic plant placed at different distances from a light source.
Which results would be expected from this investigation?
Options
| distance from light source / | ||||||
|---|---|---|---|---|---|---|
| 20 | 40 | 60 | 80 | 100 | 120 | |
| number of bubbles / minute | ||||||
| A | 8 | 18 | 37 | 51 | 62 | 65 |
| B | 8 | 18 | 37 | 25 | 19 | 6 |
| C | 65 | 62 | 51 | 45 | 14 | 4 |
| D | 37 | 18 | 8 | 19 | 25 | 45 |
What is the balanced equation for photosynthesis?
Options
A
B
C
D
Glucose produced by photosynthesis can be converted into other carbohydrates or used immediately as glucose.
What is an immediate use of glucose in plants?
Options
A building cell walls
B providing energy in respiration
C storing energy
D transporting energy in the phloem
Soil that contains more water allows denitrifying bacteria to grow well.
Which effects will be seen on the growth of plants in this soil?
Options
A More nitrate ions are taken up by plants, so plants grow less well.
B More nitrogen fixation takes place, so plants grow taller.
C Denitrification results in nitrogen gas being taken up by plants and they grow taller.
D There are fewer nitrate ions in the soil, so plants grow less well.
Which changes occur in the air spaces of a green leaf on a sunny day?
Options
| carbon dioxide concentration | oxygen concentration | |
|---|---|---|
| A | decreases | decreases |
| B | decreases | increases |
| C | increases | decreases |
| D | increases | increases |
Which diagram correctly links the carbohydrates made as a result of photosynthesis with their uses?
Options
An investigation is carried out on the rate of photosynthesis in different environmental conditions.
The graph shows the results.
Which conditions could have produced the results for curve R?
Options
| percentage carbon dioxide in air | environmental temperature / | |
|---|---|---|
| A | 0.004 | 20 |
| B | 0.04 | 30 |
| C | 0.4 | 20 |
| D | 4.0 | 30 |
Hydrogencarbonate indicator changes colour according to the concentration of carbon dioxide present.
The table shows these changes.
| colour of hydrogencarbonate indicator | concentration of carbon dioxide |
|---|---|
| orange | atmospheric carbon dioxide concentration |
| yellow | higher than atmospheric carbon dioxide concentration |
| purple | lower than atmospheric carbon dioxide concentration |
Four test-tubes were set up under different conditions. The colour of hydrogencarbonate indicator in each test-tube at the start of the experiment and after one hour is also shown.
Which test-tube shows that the rates of photosynthesis and respiration are the same?
Options
The diagram shows a section through a dicotyledonous leaf.
Which structures are almost transparent to help increase the rate of photosynthesis in the leaf?
Options
A 1 and 2
B 2 and 3
C 3 and 4
D 4 and 5