The answer is D. Bacterial calls do not have chloroplasts or cell walls, but both have cell membranes ribosomes, and a nucleus.
Primary succession is a process of forming ecosystems in an area that has never been inhabited before. Since living organisms are necessary for forming the soil, which is a foundation of every land ecosystem, at the point before the soil formation or pedogenesis has occurred the ecosystem provides very few habitats.
Answer:
Cohesion means sticking together
Explanation:
If you’re talking about a literal vitamin then I’d say vitamin B-12 because this is usually stored int our liver for later reasonings.
If you include minerals as well, calcium is a main storage for your bones
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.
