Study Notes
Plants use photosynthesis to produce carbohydrates using sunlight. Key plant structures like roots, stems, leaves, and flowers play essential roles in this process.
- Roots — anchor the plant to the soil and supply water and minerals. Example: Roots absorb water from the soil.
- Stems — support the leaves, flowers, and fruits. Example: Stems hold the plant upright.
- Leaves — capture light energy using chlorophyll for photosynthesis. Example: Leaves are green due to chlorophyll.
- Flowers — the reproductive part of the plant. Example: Flowers produce seeds.
- Photosynthesis — process by which plants make carbohydrates using sunlight. Example: Photosynthesis occurs in the chloroplasts.
- Chlorophyll — green pigment that traps light energy for photosynthesis. Example: Chlorophyll gives leaves their green color.
- Glucose — a carbohydrate produced during photosynthesis. Example: Glucose is used for energy and stored as starch.
Exam Tips
Key Definitions to Remember
- Photosynthesis: process by which plants make carbohydrates using sunlight.
- Chlorophyll: green pigment that traps light energy for photosynthesis.
- Glucose: a carbohydrate produced during photosynthesis.
Common Confusions
- Confusing the role of chlorophyll with chloroplasts.
- Thinking photosynthesis occurs only in the presence of light without considering other factors like carbon dioxide.
Typical Exam Questions
- What is photosynthesis? Photosynthesis is the process by which plants make carbohydrates using sunlight.
- How do plants use glucose? Plants use glucose for respiration, as a starch store, and to make other molecules.
- Why are leaves green? Leaves are green due to the presence of chlorophyll.
What Examiners Usually Test
- Understanding the process and importance of photosynthesis.
- The role of different plant structures in nutrition.
- The relationship between light intensity and the rate of photosynthesis.