Important muscle electrical signals is the movement of charged material (ions) across cellular membranes in a limited area
the correct answer you are looking for would be letter B. formation of geological layers
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Answer:
Petiole
Explanation:
The petiole is the part of the leaf that attaches the leaf to the main stem of the plant. Depending on the leaf structure of the plant, some leaves may be devoid of a petiole, and be regarded as apetiolate.
