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Questions: Plant Transpiration

Source lesson

1. Which are the two physical processes that allow the loss of water in the leaves?
2. "If a plant wants to obtain water, it has to lose water". Is this assertion true? Why?
3. Why is it good for a plant to lose water by transpiration?
4. Why is it bad for a plant to lose water by transpiration?
5. Why is transpiration important to keep a plant upright?
6. How does transpiration make the replication of DNA possible?
7. Where is the boundary layer thicker: around the leaves of a cactus or around the leaves of a poplar? Why?
8. How does the rate of transpiration change when you take a plant from inside a house to a garden? Why?
9. How does the rate of transpiration change when you start boiling water in the same room where you have a plant? Why?

Questions: Plant Reproduction

1. There are two ways in which a plant can be hermaphrodite. Which ones?
2. What is the minimum composition of a male flower?
3. The anthers of grasses are very big and dangle out of the flower. Do you expect these flowers to have a colourful big corolla? Why?
4. Which one of the three main parts of a pistil is the least necessary? Why?
5. How many nuclei does each pollen grain have when it is fully developed?
6. What is the mission of the tube nucleus of a pollen grain?
7. There is one egg-cell inside each _______________. One ovary can contain one or several _______________.
8. When fertilized, the ovules develop into _______________ and the ovaries that contain them develop into _______________.
9. What is the micropyle?
10. Why is plant fertilization called "double fertilization"?
11. What are the main components of a seed? What is the function of each?
12. How can a fleshy fruit help the dispersal of its seeds?

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