photosynthesis

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Which is the equation for photosynthesis?
C6H12O6 + 6 O2 → 6 CO2 + 6 H2O
1 of 13
What was the independent variable in this investigation?
distance of the pondweed from the lamp
2 of 13
Explain how an increase in temperature would affect the results of this investigation
bubbles (of gas) would be produced faster

(because) enzymes work faster
3 of 13
Suggest one way the investigation could be improved so the temperature of the water does not increase.
place a tank / beaker of water between the lamp and tube / pondweed
4 of 13
Suggest two improvements to the investigation so the results would be more valid.
1)measure the volume of gas produced
2)control the concentration of carbon dioxide (in the water)
5 of 13
Describe how water is transported from the soil to the atmosphere through a plant.
1)travels through xylem (vessels) to the leaves

2)ignore travels upwards in the xylem unqualified
3) (absorbed from soil) by osmosis through root hair (cells)
4)dea of driven by evaporation / transpiration
6 of 13
What is the name of the process that moves dissolved sugars through phloem tissue?
translocation
7 of 13
Explain one way sieve tube cells are specialised for their function.
1) have pores in the end walls
2)to maximise space for movement of dissolved sugars / food / contents
8 of 13
What does the structure of the companion cells suggest about the process that moves dissolved sugars through the phloem tissue?
1) requires energy
2) requires energy
9 of 13
What is the loss of water from a leaf called?
transpiration
10 of 13
Which cells control the size of stomata?
guard cells
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What do the results in the table above show about the number of stomata on the surfaces of a leaf?
there are more stomata on the lower surface
12 of 13
The investigation was done at 20 °C

How would the mass of water lost be different if the investigation was done at 25 °C?
Difference-more (mass / water) lost

Reason-evaporation / transpiration would be faster
13 of 13

Other cards in this set

Card 2

Front

What was the independent variable in this investigation?

Back

distance of the pondweed from the lamp

Card 3

Front

Explain how an increase in temperature would affect the results of this investigation

Back

Preview of the front of card 3

Card 4

Front

Suggest one way the investigation could be improved so the temperature of the water does not increase.

Back

Preview of the front of card 4

Card 5

Front

Suggest two improvements to the investigation so the results would be more valid.

Back

Preview of the front of card 5
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