In multicellular organisms, life begins as a single cell until occurs, causing growth. please hurry !!

Which action is characterized of mental illness 1.brushing teeth every hour because ones mouth feels dirty ? 2. forgetting to eat breakfast on a busy day? 3.crying three days over a relationship breakup? 4.feeling embarrassed about going to school after failing in front of friends?

Which of these is not related to the teeth? a. chymob. pulpc. enamold. dentin

Warming up prepares the body for exercise in what way? a. muscularly b. cardiovascularly c. neurologically d. all of the above