In a resting state, sodium (Na ) is at a higher concentration outside the cell, and potassium (K ) is more concentrated inside the cell. During an action potential, the sodium levels <u>increase </u>inside the cell.
During an action potential, the potassium level inside the cell decreases, and the sodium level inside the cell increases. That is to say, there is an outflow of potassium and an inflow of sodium ions.
Action potential usually occurs when an electrical signal disrupts the balance of Na+ and K+ within a cell membrane, briefly depolarizing the concentrations of each.
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That would be B. From energy in photons.
Photons(from sunlight) give energy to electrons and “excite” them(sending them to a higher energy level). Electrons can then release this energy and excite other electrons in other chlorophyll molecules.
If the reproductive isolation between two species is complete, they cannot produce viable offspring. There is not enough information to determine if they did or didn't have a recent common ancestor
Explanation:
The structure of an ecosystem is a group of the organisms and physical features of environment including its own amount and its distribution of nutrients in a particular habitat. It helps to also provide info regarding the range of climatic conditions that try to harm the ecosystem in the area.
