Because if we're simultaneously moving/manipulating two different variables it can be very hard to determine why one variable is changing and why the other is changing. While this can be done with more complicated experimental designs, it usually is the case that scientists will only manipulate one variable and not two different ones.
In the<em> </em><u><em>fall,</em></u> a tree's will change color and fall off. Later in the<em> </em><u><em>winter,</em></u> the tree will not have any leaves and will be dormant. Soon the seasons change again. In the <u><em>spring,</em></u> leaves will start to grow back, and flowers will bloom. In the <u><em>summer,</em></u> leaves will stay full and green.
Answer:
The correct answer is - 24, 24
Explanation:
In any type of cell division, there is an interphase stage before the actual process of division which is a preparatory process or stage that includes different substages like G1, S, and G2. S phase is a synthesis of the cell cycle responsible for duplication or replication of the DNA.
So, at the end of the S phase, the DNA amount becomes double its initial amount and remains the same in the G2 phase. So, if the initial amount is 12 picogram then it will be double in the S phase and remain 12 in G2 as well.