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Biology, 01.12.2021 22:00 isobelbunney
How long will it take three quarters of a sample of a radioactive
element to decay if its half-life is 4 days?
a. 2 days
b. 3 days
c. 4 days
d. 8 days
5
Another word for variation is
a. similarity
b. difference
c. adaptation
d. mutation
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Answers: 1
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