In the deep ocean, currents are what sea creatures use to travel at a faster and easier rate. If these currents decrease than it would be hard for them to travel. For example, if a sea turtle needed to lay her eggs, but there was no current, she might not get to land on time before she has to lay them.
Fragmentation never occur in a unicellular organism !!
<span>The correct answer would be amoeba. So the amoeba consists of protoplasm and a nucleus. For an amoeba the nucleus is a major organelle, which is located centrally. As such a major organelle it naturally has a huge role, and that is that it controls reproduction (it contains the chromosomes) and many other important functions (including eating and growth).</span>