The answer for the above question is Mutation.
Mutations are random spontaneous changes that occur suddenly in the DNA. A single mutation can have a large effect, however in may cases evolutionary changes are based on the accumulation of many mutations. The gene flow is any movement of genes from one generation to another and is an important source of mutation
Answer:
pre zygotic barriers including temper isolation
Answer:
15% of the world does not have access to clean fresh water.
Explanation:
Young kids are having kids
