Acid rain is caused by a chemical reaction, due to when the two compounds sulfur dioxide and nitrogen are released into the air. Therefore, the answer is 4!
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Groups of three or more monomers are called polysaccharides, starch and include short-term storage. Monomers are small molecules, mainly organic, that can combine together to produce larger molecules, or polymers. All monomers can form chemical connections with at least two other monomer molecules. Monomers are small molecules, mainly organic, that can combine together to produce larger molecules, or polymers.
All monomers can form chemical connections with at least two other monomer molecules. Sugars, amino acids, fatty acids, and nucleotides are the four main forms of monomers. Each of these monomer kinds is essential to the survival and evolution of life, and each can be generated abiotically.
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Answer:
A) A decrease in Na+ permeability, and an increase in K+ permeability.
Explanation:
When the potential action reaches a peak of about +40 mv Na+ channels are open and a high number of Na+ ions are entering the inside of the cell. Shortly after this happens the K+ channels will start to open their gates increasing the cell K+ permeability while the Na+ channels will start to close their gates, so the Na+ permeability will decrease. This happens in order to valance the positive charge on the inside of the cell. Normally the inside has a negative charge while the outside has a positive one, as the inside is more positive due to the increase in Na+ permeability at the beginning of the potential action, K+ cations (which are in abundance in the cell) will have to go out through the K+ channels so as to restore the charge valance, that means that there is an increase in K+ permeability.
