Question

The statement - All the tissues are made up of individual cells, is given by

A

Schleiden

B

Schwann

C

Virchow

D

Wallace

Medium

Solution

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Correct option is
A

Schleiden

Two German biologists M.J.Schleiden (1838) and Theodore Schwann (1839) proposed the cell theory. According to the theory, all living organisms are composed of cells, which are the smallest entities that can be called as living.
Cells are the functional unit of an organism. Schleiden stated that all the tissues are made up of individual cells.
A German biologist Rudolph Virchow observed that all living cells arise from pre-existing cells (omniscellula e cellula) which was added to the cell theory as a doctrine. Alfred Russel Wallace, a British naturalist, conceived the theory of evolution through natural selection while working on Amazon River basin and then in the Malay Archipelago.
Thus, the correct answer is option A.

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