Answer: Option B,C, E and F
Explanation:
Action potential describe rise or fall of membrane potential of a particular cell location. This happen when neuron send impulses away from cell body. During action potential, one of the neural membrane opens so as to allow positively charged ions inside the cells and negatively charged ions to move outside the cell.
Nitrogen-fixing bacteria change nitrogen into a form of soluble nitrates that plants can use ...the air is 80% nitrogen but it is in N2 form which plants cannot use
Answer:
i think C
Explanation:
Natural selection is the process where organisms better adapted to their environment tend to survive and produce more offspring.
Unlike a bar magnet<span>, however, </span>Earth's magnetic field<span> changes over time because it is generated by a geodynamo (in </span>Earth's<span> case, the motion of molten iron alloys in its outer core).</span>
