GCSE Biology (AQA)
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Calculating Areas of Colonies
- The area of a bacterial colony in a Petri dish can be calculated using the formula for the area of a circle: A = ��r��.
- The formula requires the radius of the colony, which can be derived by measuring the colony's diameter and dividing by two.
- Measurements can be in millimeters or centimeters, affecting the unit of the area (mm�� or cm��).
- Example calculation:
- Measure the diameter of the colony (e.g., 10 mm).
- Calculate the radius (e.g., 10 mm / 2 = 5 mm).
- Insert the radius into the formula (�� �� 5�� = 78.5 mm��).
- The calculated area for the example colony is 78.5 mm��.
- It's important to know this calculation method for academic assessments.
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