Photosynthesis
Name______
Teacher______
Type answers to the following questions.
1If the rate of photosynthesis is increased, what will happen to the rate of growth and development?
2Answer the following true/false statements about photosynthesis. Code each of the statements T if you think they are TRUE and F if you think they are FALSE.
aSunlight is essential for the photosynthesis reaction.bPhotosynthesis takes place in all parts of the plant.
cSugars and starch are carbohydrates.
dWater is taken into the plant through the leaves.
eCarbon dioxide is taken into the plant through the stomata.
fAs the intensity of light increases the rate of photosynthesis will continue to increase indefinitely.
gTropical plants have a greater potential for maximum growth than temperate plants.
hWater availability has no effect on photosynthetic rate.
3Rewrite each of the false statements so they are correct.
4A farmer growing flowers in glasshouses achieves higher temperatures inside the glasshouse than outside. This is due to the solar radiation trapped in the glasshouse during the day. Carbon dioxide is also added to the air during the day to increase the photosynthetic rate of the crop.
The farmer is aiming to increase the rate of photosynthesis of the flower crop and hence increase the yield. To ensure that this occurs, the farmer needs to reduce the effects of other limiting factors.
Identify two factors that could limit the photosynthetic rate of the crop and describe how each one would have an effect on the final growth of the crop. (Assume that temperature and carbon dioxide levels would not be limiting.)
5In some crops, for example tomatoes, pruning is carried out to reduce the leaf cover and thus the effect of shading. Explain why a farmer would want to prune back some of the leaf cover. What effect would pruning have on a crop where the marketable product is not the leaves?
1
2004