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Nookie1986 [14]
3 years ago
12

Four contributing factors that may lead to an increase of learners abusing substances at schools​

Biology
1 answer:
Fynjy0 [20]3 years ago
7 0
Hi how are you doing today Jasmine
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A single change or alteration in the nucleotide base of the genetic material of the cell is called a point mutation.  It can be a deletion, addition or inversion of a single nucleotide base.

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brainly.com/question/10473763

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