Which of these statements is a key idea of the cell theory?
All living organisms are made up of cells.
The cell theory, put forward by Schleiden and Schwann and extended by Virchow, has three main ideas: all living organisms are made up of one or more cells; the cell is the basic structural and functional unit of life; and new cells arise from pre-existing cells.
The statement that all living organisms are made up of cells is the first of these ideas.
The other statements are not part of the theory and are incorrect: cells carry out all life processes; cells are found in plants, fungi, protists and bacteria as well as animals; and while most cells need a microscope to be seen, some (such as a hen's egg) are visible to the naked eye, and visibility is not an idea of the theory.
Hence, All living organisms are made up of cells.
Similar Questions
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Important Questions from Cell
Which of the following is an epithelial tissue?
I. Squamous
II. Ciliated
Cells of ______ and ______ tissues are living cells.
The process of converting ammonia into nitrates is called:
Which of the following is not true about prokaryotic cells?
Fore limbs of whale, bat, tiger and man are examples of
