Define pollination as transfer from anther to stigma
Identify the start, destination and material transferred.
Mapped to the named 0654 section using teaching from the corresponding single-science course. A 0654-specific review of every Core and Supplement objective is still in progress. Written practice is self-checked; it does not demonstrate supervised laboratory competence or award an official Cambridge grade.
Before you begin
- Recall gametes, nuclear fusion, cellular respiration and the distinction between reproduction and growth.
Work on paper. Try each question before revealing help, and explain why your method works.
Quick readiness check
Which route defines pollination?
What you will learn
- Trace the pollen transfer route
- Distinguish pollination from other movements
Define pollination as transfer from anther to stigma
| Feature | Meaning |
|---|---|
| Material | Pollen grains |
| Origin | Anther |
| Destination | Stigma |
| Separate events | Fertilisation, seed dispersal and seed germination |
Trace the pollen transfer route
Pollination is the transfer of pollen grains from an anther to a stigma. Keep all three elements in the definition: the material is pollen grains, the producing origin is an anther and the receiving destination is a stigma. Transfer may involve wind or an animal and may occur within a flower or between flowers. Later lessons distinguish whether the flowers belong to the same plant or different plants.
A grain leaving an anther and landing on a petal has moved, but has not yet reached the required destination in this definition. Likewise, an insect entering a flower is a visit, not automatically evidence that it picked up pollen and deposited grains on a stigma. Use the supplied route or observation to establish the complete anther-to-stigma transfer.
Distinguish pollination from other movements
Seed dispersal is the movement of seeds away from their origin after seed formation; it is not pollen transfer. Germination is the start of seed growth under suitable conditions, not the anther-to-stigma event. Fertilisation is a later nuclear-fusion event, and pollination alone does not establish that compatible pollen, a receptive stigma and successful later processes were present.
Explain the sequence without collapsing it. First identify pollen production in anthers and transfer to stigmas. Then recognise that a later fertilisation route may follow under suitable conditions. A still photograph of an anther beside a stigma can teach the organ identities, but does not record pollen movement unless that event is separately supplied.
Sources for this lesson
Pause and explain
Does pollen landing only on a petal complete pollination?
Worked example
A record shows pollen taken from an anther and deposited on a stigma. Name the process.
Show the worked solution
- The transferred material is pollen.
- The route ends at a stigma.
Answer Pollination.
Try a topic test
Choose Easy, Normal or Difficult. Save your answers and open worked review after finishing.
Test this topic →From guided practice to a new situation
Write your answer and reasoning first. Use a hint only if you are stuck. The model solution is for self-checking; your written work is not automatically marked.
Write a complete definition of pollination.
Give me a hint
Include material, origin and destination.
Compare my reasoning
- The material is pollen grains.
- They move from an anther to a stigma.
Transfer of pollen grains from an anther to a stigma.
Look for these in your work
- Name pollen grains
- State both origin and destination
Classify these supplied routes: pollen anther → stigma; seed fruit → ground; pollen anther → petal only.
Give me a hint
Check the transferred material and destination.
Compare my reasoning
- The first completes the required pollen route.
- The second is dispersal; the third lacks a stigma destination.
First: pollination. Second: seed dispersal. Third: pollen movement, but pollination has not been established.
Look for these in your work
- Apply the complete definition
- Distinguish the other movements
A bee was filmed entering a flower, but pollen pickup and stigma deposition were not recorded. What can the record establish?
Give me a hint
Separate a visit from the required transfer.
Compare my reasoning
- A visit was recorded.
- The pollen-transfer route remains unverified.
It establishes a flower visit, not necessarily pollination. Evidence of pollen transfer from anther to stigma is still needed.
Look for these in your work
- Retain the observed visit
- State the missing transfer evidence
Common mistakes
- Calling every insect visit pollination.
- Calling seed dispersal pollination.
What can you explain now?
Does pollen landing only on a petal complete pollination?
Compare with the explanation
No; the required destination is a stigma
The definition specifies the receiving structure.
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Make it stick
Define pollination with its material, origin and destination.
If you needed the solution, close it and solve the problem again from a blank page. A correct answer is stronger when you can explain the reason for each step.