Assertion (A): Cells are not hollow spaces as believed by Robert Hooke.Reason (R): Cells are separable units with protoplasts.
Question
Assertion (A): Cells are not hollow spaces as believed by Robert Hooke.Reason (R): Cells are separable units with protoplasts.
Solution
Assertion (A) is correct. When Robert Hooke first discovered cells in 1665, he was looking at a thin slice of cork through a microscope. The cork was dead material, so what Hooke was actually seeing were the cell walls with empty spaces between them. He described these spaces as "cells". However, we now know that living cells are not hollow spaces but contain cytoplasm and various organelles.
Reason (R) is also correct. Cells are indeed separable units with protoplasts. The protoplast is the living part of the cell, which includes the cytoplasm, nucleus, and other organelles. It is enclosed by the cell membrane.
So, both the assertion and the reason are correct, and the reason is a correct explanation for the assertion.
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Reason (R): Cells are separable units with protoplasts.
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