Answer: D
They often occur spontaneously, because when energy is released during a chemical reaction it does not usually happen slowly.
The category of organisms in a water ecosystem that includes the larger active swimmers is called Nekton. There are three classification of aquatic organisms that can be classified according to their location or habitat. One of them is Nekton which includes the larger swimmers in water ecosystem and the other two are Plankton and Benthos. Nekton are mostly fish or other living things that swim through the water.
Mitosis is process when a cell splits to create two identical copies of the original cell while meiosis cells split to form new cells with the usual number of chromosomes occurs for sexual reproduction while mitosis asexual reproduction
Centeral nervous system includes the brain and spinal cord while the peripheral includes nerves that branch out
