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Questions and Answers
Who first saw and described a live cell?
What is the cell considered as in all living organisms?
What separates the environment outside the cell from the inside of the cell?
What is a typical example of a plant cell?
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What is a typical example of an animal cell?
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Study Notes
Discovery of Live Cells
- Antonie van Leeuwenhoek is credited with first observing and describing live cells in the late 17th century.
- His discoveries were made using a simple microscope he invented, which allowed him to see microorganisms in pond water.
Fundamental Unit of Life
- Cells are considered the basic unit of all living organisms, forming the building blocks for life.
- Every organism, whether unicellular or multicellular, is composed of cells that perform essential functions for survival.
Cell Membrane
- The cell membrane separates the internal environment of the cell from the external environment.
- It acts as a selective barrier, regulating the movement of substances in and out of the cell.
Plant Cell Example
- A typical example of a plant cell is the Guard Cell, which controls the opening and closing of stomata for gas exchange.
- Plant cells are characterized by a rigid cell wall, chloroplasts for photosynthesis, and large central vacuoles.
Animal Cell Example
- A typical example of an animal cell is the Red Blood Cell (erythrocyte), which transports oxygen throughout the body.
- Unlike plant cells, animal cells lack a cell wall and contain various organelles for diverse functions.
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Description
Test your knowledge on the key points of the cell unit of life in biology with this quick revision quiz. From prokaryotic and eukaryotic cells to the basic structure of organisms, this quiz covers it all. Perfect for NEET exam preparation and quick revision using NCERT extracts and short notes.
