THE CELL
CELL THEORY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The fern is made up of compounds that are not cells.
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The fern’s cells came into existence spontaneously.
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The fern is made up of a collection of cells.
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The cells that make up the fern are nonliving.
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Detailed explanation-1: -Christopher is learning about the cell theory in science class, and he applies it to a fern that is growing in his bedroom. The cell theory states that which of the following characteristics of the fern must be true? The fern is made up of compounds that are not cells.
Detailed explanation-2: -The unified cell theory states that: all living things are composed of one or more cells; the cell is the basic unit of life; and new cells arise from existing cells.
Detailed explanation-3: -In 1838, Matthias Schleiden, a German botanist, concluded that all plant tissues are composed of cells and that an embryonic plant arose from a single cell. He declared that the cell is the basic building block of all plant matter.
Detailed explanation-4: -The cell theory was proposed by two scientists-Schleiden (1838)and Schwann (1839). It says that all the plants and animals are composed of cells and the cell is the basic unit of life. The cell theory was further expanded by Virchow (1855) by suggesting that all cells arise from pre-existing cells.
Detailed explanation-5: -The classical cell theory was proposed by Theodor Schwann in 1839. There are three parts to this theory. The first part states that all organisms are made of cells. The second part states that cells are the basic units of life.