As you ascend from the medulla oblongata to the cerebrum, the functions of each successive level become:

economic impact of malaria is estimated to cost africa $12 billion every year. this figure factors in costs of health care, absenteeism, days lost in education, decreased productivity due to brain damage from cerebral malaria, and loss of investment and tourism.

a- all cells come from pre-existing cells

sound moves fastest in solids because the molecules are tightly packed and it allows sound to vibrate