Draw and label the required flower structures
Produce a clear cutaway with labels that point to the intended parts.
Section 16.3 · Sexual reproduction in plants
Core and Extended; Biology 0610, 2026–2028. Use the stated specimen features and evidence. Diagrams are schematic. Written practice is self-checked
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
Where should an ovule label line end?
What you will learn
- Plan the biological relationships before drawing
- Use labels to check the structure of the model
Draw and label the required flower structures
| Feature | Meaning |
|---|---|
| 1 · Sepals | Protect the developing bud |
| 2 · Petals | Can attract insect visitors |
| 3 · Anther | Produces pollen grains |
| 4 · Filament | Supports and positions anther |
| 5 · Stigma | Receives pollen |
| 6 · Style | Connection and pollen-tube route |
| 7 · Ovary | Contains ovules |
| 8 · Ovules | Contain female reproductive cells |
| 9 · Stamen | Complete anther + filament unit (3 + 4) |
| 10 · Carpel | Includes stigma, style and ovary (5 + 6 + 7) |
| Feature | Meaning |
|---|---|
| Outlines | Clear enough to distinguish neighbouring structures |
| Internal view | Ovules are inside a sectioned ovary |
| Groups | Stamen and carpel must include their connected parts |
| Assessment | Actual drawing and practical competence require review |
Plan the biological relationships before drawing
Begin with the relationships the drawing must communicate. Place the stigma above the style, connect the style with the ovary, and show ovules inside the cutaway ovary. Draw anthers on supporting filaments so each pair forms a stamen. Surround the reproductive structures with petals and place sepals outside near the base. These relationships matter more than making the drawing resemble a decorative flower icon.
Use clear continuous outlines large enough to distinguish adjacent parts. The original cutaway deliberately exposes internal ovules; indicate that it is a section rather than implying an intact ovary is transparent. Keep an ovule separate from the enclosing ovary wall. Likewise, do not detach an anther from its filament or draw a style leading into an unrelated petal.
Use labels to check the structure of the model
Add label lines with endpoints on the intended feature. A line labelled anther should reach the pollen-producing structure, while a line labelled filament should reach its supporting stalk. Use a bracket or a clearly explained grouping to identify the complete stamen and carpel, rather than pointing both group labels at arbitrary empty space. Keep lines distinguishable and avoid crossing several labels through the same small region.
Self-check the ten required names and their relationships after drawing. An attractive sketch can still omit ovules or misplace the stigma. Comparing with the model helps find missing labels, but a written checklist does not automatically mark the learner’s drawing or certify practical competence. A teacher must judge the actual drawing against the relevant task and any specimen evidence supplied.
Pause and explain
What identifies the complete stamen clearly?
Worked example
A learner labels a line ending on the ovary wall as an ovule. How should the drawing be corrected?
Show the worked solution
- The wall belongs to the ovary.
- An ovule label must end on one of the internal structures.
Answer Move the ovule label endpoint to an internal ovule and label the enclosing organ separately as the ovary.
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.
List four central labels for a carpel cutaway and describe their arrangement.
Give me a hint
Begin with the receiving surface and work inward.
Compare my reasoning
- Stigma connects through style to ovary.
- Ovules lie inside the ovary.
Stigma above style; style connects to ovary; ovules are shown within the cutaway ovary.
Look for these in your work
- Include all four labels
- Retain the enclosing relationship
A drawing includes anthers but no supporting filaments. Which required part and complete group are not yet adequately represented?
Give me a hint
Anther is only one part of the unit.
Compare my reasoning
- A filament supports an anther.
- Together they form a stamen.
Filaments are missing, so the complete stamen grouping is not adequately represented.
Look for these in your work
- Identify the missing part
- Explain the effect on the complete group
Draw a complete labelled flower cutaway on paper, then explain why comparing it with this model is not an automatic grade.
Give me a hint
Produce the diagram and separate feedback from assessment.
Compare my reasoning
- Include all ten required names and correct relationships.
- The actual drawing needs human judgment against the task.
The drawing should show sepals, petals, stamens, filaments, anthers, carpels, style, stigma, ovary and ovules. A model comparison supports self-checking but does not automatically grade the drawing or prove practical competence.
Look for these in your work
- Produce all required labels
- Keep teacher assessment pending
Common mistakes
- Labelling a group without showing its parts.
- Claiming a self-check automatically grades the drawing.
What can you explain now?
What identifies the complete stamen clearly?
Compare with the explanation
A grouping that includes anther and filament
Both parts belong to the complete unit.
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
Draw and label the complete model, then check the relationships and label endpoints.
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.