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25/12/2021 4:53 pm
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In a pond, there were 20 Hydrilla plants. Through reproduction, 10 new Hydrilla plants were added in a year. Calculate the birth rate of the population.
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25/12/2021 5:00 pm
The birth rate of Hydrilla is 10/20, i.e. 500 per thousand or 50 per cent or 0.5 per individual.