Answer:
B
Explanation:
the fundamental unit of heredity
When an object vibrates, it causes slight changes in air pressure. These air pressure changes travel as waves through the air and produce sound. ... In gases, the higher the velocity of sound, the higher the pitch will be (Remember the "Mickey Mouse" sound when people talk after inhaling helium gas?).
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I manage to check the attachment from other sources. The one that should indicates an enhancer region is <span>This is an enhancer region.</span>
Compare the limbs of different organisms goes in left box. compares fossilized structures to living organisms left box.
other 2 go in the right box hope this helped(: