Answer:
Primary succession occurs following an opening of a pristine habitat, for example, a lava flow, an area left from retreated glacier, or abandoned strip mine. In contrast, secondary succession is a response to a disturbance, for example, forest fire, tsunami, flood, or an abandoned field.
Tachycardia is a condition of a heart that beats very fast
The heart/lung machine is necessary
when performing heart transplant surgery because during surgery, the actual
heart is stopped so the heart/lung machine acts as a substitute heart that supplies
oxygen and pumps blood to the body until the actual heart start functioning.
They get energy by preforming chemical reactions within the cell
