1.1 Cell structure

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Question 23
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The graph below shows the growth of a population of Chlorella vulgaris (a photosynthetic microalga) in a bioreactor over a period of 24 hours.

Growth of Chlorella vulgaris microalga culture over 24 hours

To compare the rates of division at different times during this growth cycle:

a.

Estimate the rate of division at t=8t = 8t=8 hours by finding the gradient of the tangent line at t=8t = 8t=8.

[2]
b.

Estimate the rate of division at t=16t = 16t=16 hours by finding the gradient of the tangent line at t=16t = 16t=16.

[2]
c.

Calculate how many times faster the rate of division is at t=8t = 8t=8 hours than at t=16t = 16t=16 hours.

[2]

1.1 Cell structure Questions

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