Multiple Choice
Which of the following scientist was the first to observe blood cells using a microscope?
1. Overview of Cell Biology
History of Cell Biology
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Which of the following is not a part of the cell theory?
A
Organisms are composed of one or more cells
B
Cells always interact with the external environment
C
The cell is the structural unit of life
D
Cells arise from preexisting cell division
Verified step by step guidance1
Understand the basic tenets of the cell theory: (1) All living organisms are composed of one or more cells, (2) The cell is the basic unit of structure and organization in organisms, and (3) All cells arise from pre-existing cells.
Review each statement provided in the problem to determine if it aligns with the established principles of the cell theory.
Analyze the statement 'Organisms are composed of one or more cells' and recognize that it aligns with the first tenet of the cell theory.
Evaluate the statement 'The cell is the structural unit of life' and see that it corresponds with the second tenet of the cell theory.
Consider the statement 'Cells always interact with the external environment' and identify that it is not a part of the traditional cell theory, as it describes a characteristic of cell behavior rather than a foundational principle of cell theory.
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