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Mind Map: The Fundamental Unit of Life - Science Class 9 PDF Download

Mind Map: The Fundamental Unit of Life

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FAQs on Mind Map: The Fundamental Unit of Life - Science Class 9 PDF Download

1. What is a cell?
Ans. A cell is the basic unit of life. It is the smallest structural and functional unit of an organism that is capable of performing all the processes necessary for life.
2. What are the main components of a cell?
Ans. The main components of a cell include the cell membrane, cytoplasm, and nucleus. The cell membrane acts as a barrier and controls the movement of substances in and out of the cell. The cytoplasm is a gel-like substance that contains various organelles and is responsible for carrying out cellular processes. The nucleus contains the genetic material (DNA) of the cell and controls the cell's activities.
3. How do cells reproduce?
Ans. Cells can reproduce through a process called cell division. There are two types of cell division: mitosis and meiosis. Mitosis is a type of cell division that results in the formation of two identical daughter cells, each with the same number of chromosomes as the parent cell. Meiosis, on the other hand, is a type of cell division that occurs in reproductive cells and results in the formation of gametes (eggs or sperm) with half the number of chromosomes as the parent cell.
4. What are the different types of cells in the human body?
Ans. The human body is composed of various types of cells, each with a specific structure and function. Some examples of different cell types in the human body include nerve cells (neurons) that transmit electrical signals, muscle cells that enable movement, red blood cells that carry oxygen, and skin cells that provide a protective barrier.
5. How do cells obtain energy?
Ans. Cells obtain energy through a process called cellular respiration. During cellular respiration, cells break down glucose and other molecules to release energy in the form of adenosine triphosphate (ATP). This energy is used by cells to carry out various activities, such as growth, movement, and reproduction.
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