Sea urchins are preyed about by many predators that inhabit their marine environment, but also those animals that don't. The main predators of the sea urchin are crabs, large fish, sea otters, eels, birds and humans.
Interphase is the phase during which the growth of the cells take place along with the metabolic activity but the nuclear division in the cell does not occur. The three stages included within the interphase are the G1, S and G2.
Interphase is the longest phase in the cell cycle, because, in that phase, the cell needs to grow, duplicate and replicate chromatin and other parts, and prepare itself for thâ¦e mitotic phases. Interphase has three stages, G1, S, and G2. 2 people found this useful.