Camillo Golgi, discovered the method of staining individual cell structures. He used weak solution of silver nitrate to study golgi apparatus.

Rusting of an object made of iron is called rusting. Rust is a chemical change because rust is a chemical compound (hydrated iron oxide), completely different from the element iron (Fe).

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The nature of matrices varies according to their function. For example, cartilage contains calcium salts as it supports bones while muscles contain contractile proteins for their movement function.

Class 9th Science Session 2022-23 Class IX Science MCQ Extra Questions Answers Class 9 Science Terminal Exams MCQ Solutions 9th Science Terminal Exam Based MCQ Extra Questions