C. testable and observable
Primary succession occurs when a natural disaster like an EQ, volcanic eruption, or flood, occurs to an area where there is no plant or animal life. The first organisms to appear are lichens, which over a long period of tome, will begin to form soil.
The motor neuron and muscle fiber intersect at what is called. the neuromuscular junction.
<span>Meteorology is BEST defined as the study of weather and climate.</span>
