Who proposed the cell theory?

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(A) The cell theory was proposed by Matthias Schleiden and Theodor Schwann. In $1838$, Matthias Schleiden, a German botanist, examined a large number

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Schleiden and Schwann

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(A) The cell theory was proposed by Matthias Schleiden and Theodor Schwann. In $1838$, Matthias Schleiden, a German botanist, examined a large number of plants and observed that all plants are composed of different kinds of cells which form the tissues of the plant. At about the same time, in $1839$, Theodor Schwann, a British zoologist, studied different types of animal cells and reported that cells had a thin outer layer which is today known as the '$plasma membrane$'. He also concluded, based on his studies on plant tissues, that the presence of a cell wall is a unique character of the plant cells. On the basis of this, Schwann proposed the hypothesis that the bodies of animals and plants are composed of cells and products of cells.

Year	Discovery
$(a)$ $1665$	$(i)$ Discovery of the nucleus in the cell
$(b)$ $1831$	$(ii)$ Coined the term 'cell'
$(c)$ $1838$	$(iii)$ Cell theory was proposed

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The smallest cell $= P$, the largest cell $= Q$, and the longest cell $= R$. What do $P$, $Q$, and $R$ represent in the blanks above?

Match the following correctly:

Year Discovery

$(a)$ $1665$ $(i)$ Discovery of the nucleus in the cell

$(b)$ $1831$ $(ii)$ Coined the term 'cell'

$(c)$ $1838$ $(iii)$ Cell theory was proposed

Who proposed the modern cell theory?

The first person to observe a live cell under a microscope was .......

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