A change in the heritable traits of biological populations over generations

Diffusion refers to the random motion of particles from a medium of higher concentration to a medium of lower concentration.
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B lymphocytes
Antibodies are produced by specialized white blood cells called B cells (B lymphocytes)
Answer:other dude is correct gimme brainlest
Explanation:
Answer:simply an uncontrolled fire that is wiping out large fields and areas of land.
Explanation:It is typically fires that started out of a lightning strike, or people carelessly starting it, or accidentally, or even arson, that went un-noticed and got out of hand.