Answer:
Mutation
Explanation:
The changing of the structure of a gene, resulting in a variant form that may be transmitted to subsequent generations, caused by the alteration of single base units in DNA, or the deletion, insertion, or rearrangement of larger sections of genes or chromosomes.
Answer:
birth rate, death rate, immigration, and emigration.
Explanation:
A virus.
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Answer:
The flagpole shadow got longer each mouth as autumn turned to winter
Explanation: