A sound wave is A wave of compression and rarefraction .
Most of the middle layer in the heart is composed of cardiac muscle cells
Answer:
organic amines contain nitrogen atoms, N, that are singly-bonded to at least one carbon atom.
Explanation:
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<h2>
Answer: A</h2>
Explanation:
The magnifiacation doesn't change. We aren't seeing a more detail or less detail view of the cells. Thus this eliminates B & C.
There is no change in the turgidity of the cell or in the cell membrane. Thus this eliminates D.
However, B looks darker than. This is usually a sign that the cells have been stained. This was perhaps done with Methylene Blue.
