PRELIMINARY STAGE 2026
Contest 25
West Africa SHS: 55
Oda SHS: 41
Mankessim SHTS: 31
Contest 26
St. John’s Grammar School: 60
Zion College: 36
St. Mary’s Seminary SHS, Lolobi: 15
Contest 27
Mfantsiman Girls’ SHS: 60
Kade SHTS: 36
Serwaa Kesse Girls’ SHS: 33
QUESTION
What name is given to a leaf with an undivided lamina?
ANSWER: A simple leaf
EXPLANATION
A simple leaf has a single, undivided leaf blade (lamina), unlike a compound leaf, whose lamina is divided into distinct leaflets.
PRACTICE QUESTIONS
1. What is a compound leaf?
ANSWER: A leaf whose lamina is divided into separate leaflets.
2. Give two examples of plants with pinnately compound leaves.
ANSWER: Neem and flamboyant.
3. Give an example of a plant with palmately compound leaves.
ANSWER: Kapok (Ceiba pentandra).
4. Give two examples of plants with simple leaves.
ANSWER: Mango and guava.
5. Name the three main parts of a typical leaf.
ANSWER: Lamina (blade), petiole and leaf base.
6. How can you tell a leaflet from a leaf?
ANSWER: A leaf has a bud in its axil, but a leaflet has none.
7. What is the midrib?
ANSWER: The main central vein of the lamina.
8. What type of venation do monocot leaves have?
ANSWER: Parallel venation.
9. What type of venation do dicot leaves have?
ANSWER: Reticulate (net) venation.
10. What is a petiolule?
ANSWER: The stalk of a leaflet.
11. What is the rachis?
ANSWER: The main axis that bears the leaflets of a compound leaf.
12. What is the main function of leaves?
ANSWER: Photosynthesis.