Answer - Well to put it in short terms.
Cells such as water cells or aquatic microorganisms need and required to have a large surface area increased. Because this helps them stay afloat without spending much amount of energy to float.
Body b will have a force 4 times stronger than body a, causing body b to reverse the direction of body a
Helicase "unzips" the two strands of DNA. During DNA replication.