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NCERT Textbook - The Fundamental Unit of Life | Science Class 9 PDF Download

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FAQs on NCERT Textbook - The Fundamental Unit of Life - Science Class 9

1. What is a cell?
Ans. A cell is the basic unit of life and the smallest structural and functional unit of an organism. It is capable of carrying out all the processes required for the survival and growth of an organism. Cells can be either prokaryotic or eukaryotic.
2. What are the different types of cells?
Ans. There are two main types of cells - prokaryotic and eukaryotic. Prokaryotic cells are found in bacteria and archaea and lack a nucleus and membrane-bound organelles. Eukaryotic cells, on the other hand, are found in plants, animals, fungi, and protists, and have a nucleus and membrane-bound organelles.
3. What are the different parts of a cell?
Ans. A cell has several parts or organelles, each with a specific function. Some of the important organelles in a cell include the nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, lysosomes, and ribosomes.
4. What is the function of the nucleus in a cell?
Ans. The nucleus is a membrane-bound organelle in eukaryotic cells that contains the genetic material of the cell in the form of DNA. It controls all the cellular activities and is responsible for cell division, growth, and development.
5. How do cells communicate with each other?
Ans. Cells communicate with each other through a process called cell signaling. This involves the transmission of signals or messages between cells, which can be chemical or electrical in nature. Cell signaling is essential for the coordination of various processes in the body, such as growth, development, and immune response.
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