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.
Now weâre going to do an experiment to determine how much time cells spend in each phase of cell division. Letâs count the number of cells in some onion root tips during each phase, and use this information to answer the question. On this slide, there are 21 cells in interphase, 4 in prophase, 2 in metaphase, and 1 in telophase. Why are most of the cells in interphase? Recall that interphase makes up the majority of the cell cycle. Letâs look at another slide. In this slide, there are 16 cells in interphase, 1 in prophase, and 1 in anaphase. Go ahead and try characterizing the cells yourself. Good job! Good going! Youâve got it! Nicely done! Thatâs right! Sorry, thatâs not correct. This cell is in interphase.