- Plant nutrition: absorption and transport of nutrients, transpiration, photosynthesis, respiration.
- Plant reproduction: the flower, pollination, fertilization, seed dispersal, germination.
- Plant interaction: plant hormones and growth.
Very detailed interactive animation showing how transpiration takes place in plants and which are the factors that have an influence on it. You can also read the lesson text.
Learn how to make a potometer and to use it to measure plant transpiration.
Very comprehensive animation showing how xylem sap is pumped from the roots to the leaves of a plant.
Flowering plants reproduce themselves by producing seeds, which provide the plants with a way to spread out and grow in new places, sometimes a long way from the parent. Learn how.
This animations illustrates the structures of a flower, plant breeding, cross pollination and making crosses.
Questions: Plant TranspirationSource lesson
- Which are the two physical processes that allow the loss of water in the leaves?
- "If a plant wants to obtain water, it has to lose water". Is this assertion true? Why?
- Why is it good for a plant to lose water by transpiration?
- Why is it bad for a plant to lose water by transpiration?
- Why is transpiration important to keep a plant upright?
- How does transpiration make the replication of DNA possible?
- Where is the boundary layer thicker: around the leaves of a cactus or around the leaves of a poplar? Why?
- How does the rate of transpiration change when you take a plant from inside a house to a garden? Why?
- 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
- There are two ways in which a plant can be hermaphrodite. Which ones?
- What is the minimum composition of a male flower?
- 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?
- Which one of the three main parts of a pistil is the least necessary? Why?
- How many nuclei does each pollen grain have when it is fully developed?
- What is the mission of the tube nucleus of a pollen grain?
- There is one egg-cell inside each _______________. One ovary can contain one or several _______________.
- When fertilized, the ovules develop into _______________ and the ovaries that contain them develop into _______________.
- What is the micropyle?
- Why is plant fertilization called "double fertilization"?
- What are the main components of a seed? What is the function of each?
- How can a fleshy fruit help the dispersal of its seeds?