It is the Mid-Atlantic Ridge.
Answer:
the awnser is germinating seeds.
i got this awnser correct on my test :)
Cyanobacteria which is a type of algae. It conducts photosynthesis and without it there may not have been life today because they didn't need oxygen to survive and in order to have oxygen there had to have been some form of life...
Answer: Tropism
It’s a biological phenomenon indicating growth or turning movement of a biological organism, which is usually a plant.
Answer:
Electrical stimulation of the cell is depolarization, and electrical relaxation of cells is repolarization.
Explanation:
The electrical activity of the cell depends on the charges distributed on each side of its membrane, which depends on the presence of ions on each side, extracellular sodium and intracellular potassium.
A cell, like the neuron, at rest has a tendency to be negatively charged in its cytoplasm, while the extracellular space has a positive charge.
- Depolarization of a cell occurs by opening the sodium channels, allowing this ion to enter the cell, resulting in a difference in transmembrane potential. It is electrical stimulation of the cell.
- If the potential difference is maintained and reaches the umbral level, it produces an action potential, which in cells such as the neuron produces an electrical stimulus and in the muscle cell a contraction.
- Repolarization means the opening of potassium channels, the exit of this ion to the extracellular space and the return of the cell to rest.
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