<span>A: The proportions of a population that are at different age levels make up the population’s age structure. </span>
<span>D. multiplying by the quantity of 100. When you multiply a number by 100 your doing this :
1•100=100 or 20•100=2000.
A trick for this is just giving the number the 10, 100, or 1000's zeros.
Hoped I helped!</span>
Answer:
Concentration gradient
Explanation:
Concentration gradient of the ions across the membrane generates the membrane resting potential.
Concentration gradient means that there is unequal distribution of the ions on different sides of membrane. For example, the concentration of K ions is much higher within the cell then out of the cell. Opposite is with the Na ions. When ions move from the area of their higher concentration to the are with the lower concentration, we say they move down the gradient or diffuse (no energy required). On the other hand, movement of ions against their gradient means that this process requires energy and involves protein pumps.
Turbidity<span> is the cloudiness or </span>haziness<span> of a </span>fluid<span> caused by large numbers of individual </span>particles<span> that are generally invisible to the </span>naked eye<span>, similar to </span>smoke<span> in </span>air<span>.</span>
