NCERT Class 7 Science Textbook for Blind Students made Screen readable by Professor T K Bansal.

List of key words introduced in this chapter is:

• Autotrophic
• Chlorophyll
• Heterotrophs
• Host
• Insectivorous
• Nutrient
• Nutrition
• Parasite
• Photosynthesis
• Saprotrophs
• Saprotrophic
• Stomata