Which of the following is NOT a tenet of the cell theory?
A. All living things are made of cells.
B. Cells are the basic unit of structure and function in all living things.
C. New cells are produced from existing cells.
D. All cells have all the same structural parts.

C. New cells are produced from existing cells.

Explanation:

Has three tenets:

1. All living organisms are composed of one or more cells

2. The cell is the basic unit of structure and organization in organisms

3. Cells arise from pre-existing cells

*C. is not one of them*

before it leaves the nucleus of a eukaryotic cell, mrna is altered in the following ways: - a cap is added to the 5' end of the mrna molecule; - a poly a tail is added to the 3' end; - introns are removed and exons are spliced together.

c is the answer. hope this