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In 1665, Robert Hooke, an English scientist, published his book Micrographia, in which he described that pieces of cork viewed under a microscope presented small cavities, similar to pores and filled with air. Based on knowledge discovered later on, what do you think those cavities were composed of? What is the historical importance of this observation?

Answer :

he walls of the cavities observed by Hooke were the walls of the plant cells that form the tissue. This observation led to the discovery of cells, a fact only possible after the invention of the microscope. In that book, Hooke established the term “cell", which is now widely used in biology, to designate those cavities seen under the microscope.

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