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Questions and Answers
What did Robert discover?
What did Robert discover?
- Microscopic cells (correct)
- Invisible structures
- Large structures
- Protein structures
What can be said about the size of cells?
What can be said about the size of cells?
- They are very large
- They are visible to the naked eye
- They are medium-sized
- They are extremely small (correct)
What is the nature of the cell structures?
What is the nature of the cell structures?
- Complex and multi-layered
- Simple and single-layered (correct)
- Liquid and transparent
- Solid and opaque
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Study Notes
Cell Discovery and Characteristics
- Robert Hooke discovered cells in 1665, using a microscope to observe the structure of cork tissue.
- The size of cells varies, but most cells are between 1-100 micrometers (μm) in diameter, with some cells, like nerve cells, being several centimeters long.
- Cell structures are membrane-bound organelles that perform specific functions, such as the nucleus, mitochondria, and ribosomes, which are suspended in the cytoplasm.
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