10 Questions
What is a unicellular organism?
A unicellular organism is an organism that consists of a single cell, such as Amoeba, Chlamydomonas, Paramoecium, and bacteria.
How do multicellular organisms develop from a single cell?
Multicellular organisms develop from a single cell through cell division, where cells divide to produce cells of their own kind.
What is the purpose of the activity described in the text?
The purpose of the activity is to observe and compare the shape, size, structure, and differences among cells from different parts of a plant body.
What is the significance of the discovery of the electron microscope in 1940?
The discovery of the electron microscope in 1940 made it possible to observe and understand the complex structure of the cell and its various organelles.
What is the significance of the invention of magnifying lenses?
The invention of magnifying lenses led to the discovery of the microscopic world.
What structures do we observe when preparing temporary mounts of onion peels of different sizes?
We observe similar structures that together form a big structure like an onion bulb.
Who first discovered cells and in what year?
Robert Hooke discovered cells in 1665 while observing a cork slice with a primitive microscope.
Who coined the term 'protoplasm' for the fluid substance of the cell and in what year?
Purkinje coined the term 'protoplasm' in 1839.
Who proposed the cell theory and in what years?
The cell theory was proposed by Schleiden (1838) and Schwann (1839).
What did Virchow suggest about the origin of cells in 1855?
Virchow suggested that all cells arise from pre-existing cells in 1855.
Explore the similarities in structures of onion peel cells from onions of different sizes by preparing temporary mounts and observing under a microscope. Discover how the cells form a big structure like an onion bulb, regardless of the onion's size.
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