Study Notes
Plants use photosynthesis to produce carbohydrates by capturing light energy with chlorophyll in their leaves. The main structures involved in plant nutrition include roots, stems, leaves, and flowers.
- Roots — anchor the plant to the soil and supply water and minerals to it. Example: Roots absorb water from the soil.
- Stems — support the leaves, flowers, and fruits. Example: The stem holds the plant upright.
- Leaves — capture light energy using chlorophyll for photosynthesis to produce carbohydrates. Example: Leaves are green due to chlorophyll.
- Flowers — the reproductive part of the plant. Example: Flowers produce seeds.
- Photosynthesis — the process by which plants make carbohydrates using energy from sunlight. Example: Photosynthesis produces glucose and oxygen.
- Chloroplast — an organelle in the plant cell that contains chlorophyll. Example: Chloroplasts are where photosynthesis occurs.
- Chlorophyll — a green pigment that traps light energy needed for photosynthesis. Example: Chlorophyll gives plants their green color.
Exam Tips
Key Definitions to Remember
- Photosynthesis: the process by which plants make carbohydrates using sunlight.
- Chlorophyll: a green pigment in chloroplasts that traps light energy.
- Chloroplast: an organelle in plant cells where photosynthesis occurs.
Common Confusions
- Confusing the role of chlorophyll with chloroplasts.
- Mixing up the products and reactants of photosynthesis.
Typical Exam Questions
- What is photosynthesis? Photosynthesis is the process by which plants make carbohydrates using energy from sunlight.
- How do plants use glucose produced in photosynthesis? Plants use glucose for respiration, to store as starch, and to make other molecules.
- Why are leaves green? Leaves are green because they contain chlorophyll, which is a green pigment.
What Examiners Usually Test
- Understanding the process and importance of photosynthesis.
- The role of different plant structures in nutrition.
- How environmental factors like light intensity affect photosynthesis.