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The answer to this is the presence of the basic unit of life – the cell in all living organisms. All organisms are composed of cells. Some are composed of a single cell and are called unicellular organisms while others, like us, composed of many cells, are called multicellular organisms.
Jan 14, 2018 · Learn what is a cell, the basic unit of life, with its characteristics, discovery, and types. Explore the cell structure, cell theory, and functions of cells with examples and diagrams.
- A cell is defined as the fundamental, structural and functional unit of all living organisms.
- Cells provide the necessary structural support to an organism. The genetic information necessary for reproduction is present within the nucleus. St...
- The cell structure comprises several individual components which perform specific functions essential to carry out life processes. The components...
- Cells are primarily classified into two types, namely Prokaryotic cells Eukaryotic cells
- Cell Theory was proposed by Matthias Schleiden, Theodor Schwann, and Rudolf Virchow, who were German scientists. The cell theory states that: All...
- Mitochondria are known as the powerhouse of the cells. Their primary function is to produce the energy currency of the cells, ATP. It also regulate...
- The essential functions of the cell include: The cell provides support and structure to the body. It facilitates growth by mitosis. It helps in rep...
- Golgi bodies pack and sort the proteins for secretion. It creates lysosomes and transports lipids around the cells.
- Robert Hooke discovered cells in 1665. He observed a piece of cork under a compound microscope and noticed minute structures reminiscent of small r...
Learn about the definition, theory, types and organelles of cells with CBSE Class 11 Biology Notes. Find important questions, MCQs, video and FAQs on Cell The Unit of Life.
- 4 min
- Mitochondria are membrane-bound cell organelles that generate most of the chemical energy needed to power the cell’s biochemical reactions.
- Flagellum is primarily a motility organelle that enables movement and chemotaxis. In addition to motility, flagella possess several other functions...
- The Golgi apparatus is responsible for transporting, modifying, and packaging proteins and lipids into vesicles for delivery to targeted destinations.
The cell is the basic structural and functional unit of all forms of life. Every cell consists of cytoplasm enclosed within a membrane; many cells contain organelles, each with a specific function. The term comes from the Latin word cellula meaning 'small room'. Most cells are only visible under a microscope.
- circular (usually)
- bacteria, archaea
- nucleoid region; no true nucleus
- ~ 1-5 μm [9]
May 25, 2024 · Learn about the basic unit of life, the cell, and its structure, functions, and diversity. Explore the similarities and differences between animal cells, plant cells, and bacterial cells, and the molecules and organelles that make up the cell.
Apr 27, 2017 · Cells are the basic unit of life. In the modern world, they are the smallest known world that performs all of life's functions. All living organisms are either single cells, or are multicellular organisms composed of many cells working together.
In this unit, learn how cells of all organisms - from bacteria to human beings - are essentially similar, and how they work. Why do we need to learn about cells? The cell is fundamental to all life.
