Photosynthesis Explained +
Likely WAEC Questions and
Answers (SS1–SS3 Biology)
📝 Description
This document provides a simple explanation of photosynthesis, including important definitions,
key processes, and likely WAEC questions with answers.
Suitable for SS1–SS3 Biology students preparing for exams and class tests.
📘 CONTENT
🔹 Topic: Photosynthesis
✅ Simple Explanation
Photosynthesis is the process by which green plants (autotrophs) manufacture their own food
(organic compounds/glucose) using carbon dioxide and water in the presence of sunlight and
chlorophyll, giving off oxygen as a by-product.
✅ Conditions Necessary for Photosynthesis
Sunlight: Provides the energy needed to split water molecules.
Carbon Dioxide: Diffuses through the stomata as a raw material for glucose.
Water: Absorbed by roots; provides hydrogen ions for the process.
Suitable Temperature: Required for optimum enzyme activity (usually 25°C–35°C).
✅ Importance of Photosynthesis
Food Production: It is the primary source of food for all living organisms.
Likely WAEC Questions and
Answers (SS1–SS3 Biology)
📝 Description
This document provides a simple explanation of photosynthesis, including important definitions,
key processes, and likely WAEC questions with answers.
Suitable for SS1–SS3 Biology students preparing for exams and class tests.
📘 CONTENT
🔹 Topic: Photosynthesis
✅ Simple Explanation
Photosynthesis is the process by which green plants (autotrophs) manufacture their own food
(organic compounds/glucose) using carbon dioxide and water in the presence of sunlight and
chlorophyll, giving off oxygen as a by-product.
✅ Conditions Necessary for Photosynthesis
Sunlight: Provides the energy needed to split water molecules.
Carbon Dioxide: Diffuses through the stomata as a raw material for glucose.
Water: Absorbed by roots; provides hydrogen ions for the process.
Suitable Temperature: Required for optimum enzyme activity (usually 25°C–35°C).
✅ Importance of Photosynthesis
Food Production: It is the primary source of food for all living organisms.
