Answer:
A third theory of life's origin is known as chemical evolution. In this idea, pre-biological changes slowly transform simple atoms and molecules into the more complex chemicals needed to produce life. ... This modern theory then suggests that life originated on Earth by means of a rather slow evolution of nonliving matter.
Explanation:
Answer;
-These are positive impacts of dams to the society.
Explanation;
-Dams are important because they provide water for domestic, industry and irrigation purposes. Dams often also provide hydroelectric power production and river navigation.
-Other positive impacts include; dam wall itself blocks fish migrations, which in some cases and with some species completely separate spawning habitats from rearing habitats. It also traps sediments, which are critical for maintaining physical processes and habitats downstream of the dam.
When voltage of a plasma membrane shifts from +30mV towards 0mV, we say cell is repolarizing. Repolarization results from the movement of positively charged K+ ions out of the cell. This repolarization phase of an action potential results in hyperpolarization, attainment of a membrane potential that is more negative than the resting membrane potential.