📘 Notes
Nutrition: The process by which living organisms obtain and use food is called nutrition.
Autotrophs: Green plants prepare their own food using sunlight. They are called autotrophs.
Photosynthesis: The process by which green plants prepare food using carbon dioxide, water, sunlight and chlorophyll.
Equation:
Carbon dioxide + Water → Glucose + Oxygen (in presence of sunlight & chlorophyll)
Heterotrophs: Organisms that depend on others for food.
Types of Heterotrophic Nutrition:
- Parasitic (Cuscuta)
- Saprophytic (Mushroom)
- Insectivorous (Pitcher plant)
- Symbiotic (Lichen)
📝 20 MCQs
1. Green plants are called:
a) Heterotrophs b) Autotrophs c) Parasites d) Saprophytes
Answer: b) Autotrophs
2. The process of making food is called:
a) Respiration b) Digestion c) Photosynthesis d) Excretion
Answer: c) Photosynthesis
3. Chlorophyll is present in:
a) Roots b) Stem c) Leaves d) Flowers
Answer: c) Leaves
4. Cuscuta is a:
a) Parasite b) Autotroph c) Insectivorous d) Herbivore
Answer: a) Parasite
5. Mushroom is a:
a) Parasite b) Saprophyte c) Autotroph d) Carnivore
Answer: b) Saprophyte
📗 10 Short Questions
1. What is nutrition?
Answer: The process of taking food and using it.
2. What is photosynthesis?
Answer: Process by which plants make food.
3. What is chlorophyll?
Answer: Green pigment in leaves.
4. Name one parasite plant.
Answer: Cuscuta.
5. Name one insectivorous plant.
Answer: Pitcher plant.
📕 5 Long Questions
1. Explain photosynthesis.
Photosynthesis is the process by which green plants prepare their own food using sunlight, carbon dioxide and water. Chlorophyll helps trap sunlight.
2. Differentiate between autotrophs and heterotrophs.
Autotrophs make their own food. Heterotrophs depend on others for food.
3. Explain parasitic nutrition with example.
Parasites take food from host plant. Example: Cuscuta.
Chapter 1 Images
