This would be a synonymous question as to, "why do cells not just grow big in size?"
The main reason would as to why cells have to be small, not just during cell reproduction or cell division, but all throughout their cellular life, is that the cell membrane or what they call as outside of the cell, can't sustain and maintain the insides of the cell if ever the cell grows bigger. The cell membrane is responsible in transporting food and oxygen to the insides to promote the growth and ready them for reproduction. The insides grow faster than the outside which is why there is a need to divide.
Explanation:
Platypus is well adapted for semi-aquatic lifestyle. Its streamline body and a broad, flat tail are covered with dense waterproof fur, which provides excellent thermal insulation. ... The Platypus uses its tail for storage of fat reserves and the strong claws on its feet for burrowing and moving on land.
This is straight from google "<span>During photosynthesis, a plant is able to convert solar energy into a chemical form. It does this by capturing </span>light<span> coming from the </span>sun<span> and, through a series of reactions, using its energy to help build a sugar molecule called glucose. Glucose is made of six </span>carbon atoms<span>, six </span>oxygen atoms<span>, and twelve </span>hydrogen<span> atoms."</span>
B, the earth because there is a limit of how much matter is exchanged
