AP BIOLOGY

THE CELL

CELL THEORY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
There are three parts to the cell theory. Which is NOT one of those parts?
A
All organisms are composed of one or more cells.
B
The cell is the basic unit of structure & function.
C
Cells spontaneously arise from carbon & nutrients carried in the bloodstream.
D
All cells come from pre-existing cells.
Explanation: 

Detailed explanation-1: -Answer: a. Cells spontaneously arise from carbon and nutrients carried in the bloodstream is not the part of the cell theory.

Detailed explanation-2: -Though cells require water for its composition and survival, it is not a part of cell theory.

Detailed explanation-3: -Answer and Explanation: The correct answer is a. Cell theory does not state that all cells have a nucleus.

Detailed explanation-4: -The 3 parts of modern cell theory are: cells pass DNA to new cells, cells of the same species are made of the same stuff, and energy flow happens inside cells. Biologists Schleiden and Schwann first proposed classic cell theory in 1839, and Virchow added to it in 1858.

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