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Which of the following cannot be seen in the section of an onion peel?
Centriole
Nucleus
Mitochondria
Vacuole
Centrioles are present only in animal cells. Onion peel is a plant cell which lacks centrioles.
___________ discovered the fluid within the cells as cytoplasm.
J.E. Purkinje
Carl Landsteiner
Robert Brown
Robert Hooke
J.E. Purkinje discovered the fluid within the cells as cytoplasm.
Which of the following is not a postulate of the Cell Theory?
Cells do not determine the activities and functions of organisms.
All living organisms are made of cells.
All cells arise from pre-existing cells.
The cell is the structural and functional unit of life.
Cells are responsible for the activities and functions of organisms.
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