I think A is the answer its hard to explain but i hope this helped.
What is Mutation
The major source of the genetic diversity among microorganisms upon which natural selection operates is Mutation.
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Answer:
The molecules of the substances must be touching.
Explanation:
Conduction is the process by which heat energy is transmitted through collisions between neighboring atoms or molecules
Archaebacteria move by using the form of a flagellum to propel a themselves.
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Answer:
A Flowers started to be pollinated by trees.
Explanation:
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