NCERT Class 7 Science – Chapter 1: Nutrition in Plants and Animals Chapter Summary: This chapter explains different types of nutrition. Plants prepare their own food through photosynthesis , making them autotrophic . They use sunlight, water, and carbon dioxide to produce glucose and oxygen. Some organisms, like fungi, Cuscuta (Amarbel), and certain bacteria, depend on others for food and are called heterotrophic . The chapter discusses different types of heterotrophic nutrition: Parasitic nutrition: Organisms depend on a host for food (e.g., Cuscuta ). Saprotrophic nutrition: Organisms obtain food from dead and decaying matter (e.g., fungi). Symbiotic nutrition: Two organisms benefit from each other (e.g., Lichen – a combination of algae and fungi). The chapter also explains how Amoeba captures and digests food using pseudopodia (false feet) . It highlights the importance of nutrition in all living beings. Question-Answers: 1. Fill in the Blanks: (a) During photosynt...