Compare insect and wind flowers using matched functions
Build a comparison that explains both sides rather than listing disconnected features.
Exam scope and assessment notes
Mapped to the named 0973 section using teaching from the corresponding single-science course. A 0973-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. This qualification reports two grades on the 9–1 scale; confirm the entry route for your zone and exam series.
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
What stays the same across both routes?
What you will learn
- Match attraction and transfer features across routes
- Explain production, carriage and reception separately
Compare insect and wind flowers using matched functions
| Feature | Meaning |
|---|---|
| Attraction | Animal visits versus no required animal reward |
| Release/carriage | Visitor contact and adhesion versus air release and light grains |
| Reception | Visitor-contact stigma versus feathery exposed stigma |
| Shared function | Anther produces; stigma receives |
Match attraction and transfer features across routes
Organise a comparison by function. For attraction, the supplied insect flower uses conspicuous petals and may use scent or nectar, while the wind model does not require an animal reward and commonly has inconspicuous flowers. State both sides of the comparison and the reason: an animal visitor can be attracted, whereas moving air is a physical carrier rather than a reward-seeking visitor.
For release and carriage, insect-model anthers are positioned for visitor contact and grains can adhere to the visitor. Wind-model anthers are exposed for release into air and typically produce many small light grains. Adhesion and air carriage are different transport opportunities; do not claim wind pollen must stick strongly to insects or that animal-carried grains must have no mass.
Explain production, carriage and reception separately
For reception, an insect-model stigma is positioned for contact with visitors carrying pollen. A wind-model stigma is exposed and feathery, providing area to intercept airborne grains. Both stigmas receive pollen, and both anthers produce it. Changing the route does not reverse those organ functions.
Use the original contrasted models and genuine photographs as complementary evidence. The images support visible structures, while the models explain possible transfer mechanisms. Real species vary, so the comparison is not a species-identification test or proof that one route is always more successful. Neither set of adaptations proves subsequent fertilisation without evidence of the later internal event.
Sources for this lesson
Pause and explain
What makes a stronger comparison?
Worked example
Compare stigma adaptations in the two supplied models.
Show the worked solution
- The insect stigma is placed for visitor contact.
- The wind stigma has exposed feathery receiving area.
Answer Insect model: stigma positioned for visitor contact. Wind model: exposed feathery stigma intercepts airborne pollen.
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.
Compare attraction in the supplied insect and wind flower models.
Give me a hint
State both sides and their transfer reason.
Compare my reasoning
- Animal visitors can respond to petals and rewards.
- Wind transfer does not need an animal attraction mechanism.
Insect model: conspicuous petals, and possibly scent or nectar, attract visitors. Wind model: commonly inconspicuous flowers; air carriage does not require those animal rewards.
Look for these in your work
- Include both models
- Link differences with the carrier
Compare anther position and typical pollen features for both routes.
Give me a hint
Use visitor contact versus release into air.
Compare my reasoning
- Insect anthers contact visitors and grains can adhere.
- Wind anthers are exposed and grains are typically small, light and abundant.
Insect model: anthers positioned for visitor contact with sticky/spiny grains aiding adhesion. Wind model: exposed anthers releasing many small light grains for air carriage.
Look for these in your work
- Compare producing structures
- Explain the corresponding grain features
A learner says “wind stigmas produce pollen because they are feathery.” Correct the function and compare reception.
Give me a hint
A receiving adaptation does not turn a stigma into an anther.
Compare my reasoning
- Anthers produce grains in both routes.
- Insect stigmas contact visitors; wind stigmas intercept airborne grains.
Anthers produce pollen. Feathery wind stigmas receive airborne grains; insect-model stigmas are positioned to receive grains during visitor contact.
Look for these in your work
- Correct the organ function
- Compare both receiving adaptations
Common mistakes
- Listing features without linking functions.
- Reversing producing and receiving organs between routes.
What can you explain now?
What makes a stronger comparison?
Compare with the explanation
Match each feature with its transfer function on both sides
This explains the mechanism rather than just listing adjectives.
After trying it yourself, choose your next review. This is your self-assessment.
Your review choice appears on Today. Sign in to sync it across devices.
Make it stick
Compare both routes with matched feature–function links.
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.