IB Biology SL A2.2.1 Cells As Basic Structural Unit Questions

Explain how cells form the basic structural and functional units of living organisms, carry out essential life processes and are usually microscopic.

Exam points

State that organisms are composed of cells and that cells are the basic units of life
Explain how a unicellular organism carries out all its life functions within one cell

[Maximum number: 2]

Outline the cell theory.

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a	cells can only arise from preexisting cells
b	living organisms are composed of cells/smallest unit of life
c	organisms consisting of only one cell carry out all functions of life in that cell/cells perform life functions at some point in their existence
d	although most organisms conform to cell theory, there are exceptions