AP biology transpiration lab due tomorrow! :(?

Question

explain the role of water potential in the movement of water from soil through the plant and into the air

what is the advantage of closed stomata to a plant when water is in short supply? what are the disadvantages?

describe several adapatations that enable plants to reduce water loss from their leaves. include both structural and physiological adaptations

why did you need to calculate leaf surface area in tabulating your results

~~~any help on any of the following questions will be highly appreciated.. thank you sooo much in advance~~~

Answer 1

1. Osmosis is actually dependent to water potential i.e. movement is from area of higher potential to area of lower potential. The absorption of water by the roots is dependent to transpiration. As the water evaporates in the stomates this creates a lower potential in the roots so that water will diffuse via osmosis.

2. This is a response to compensate for the minimal water. This actually save the plant from death by dehydration. You see stomates are the organ for respiration so close stomates would mean no or less respiration.

Close stomata also means less photosynthesis since less carbon dioxide enters the plant. Note that CO2 is very important in the photosynthetic process.

3. The falling of leaves is the most popular and obvious response of a plant to escape death. They can also physiologically respond by acclimatization.

4. Leaf surface area actually correspond to the amount of sunlight a plant receives. To be safe it is one of the determinants.

Hope this can still help you...

I am sorry my answers were late...