They have a nerve tissue located in the head end that can detect objects through its sense organs. The sense organs are sensitive to light, touch and vibrations.
Answer:
Cell cycle control is an example of a homeostatic mechanism that maintains proper cell function and health. While progressing through the phases of the cell cycle, a large variety of intracellular molecules provide stop and go signals to regulate movement forward to the next phase.
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250 day I believe so that it may be mature enough