What is the main difference between primary and secondary succession? A. The climax of primary succession is pine forest. B. Primary succession begins with bare rock. C. Secondary succession begins with mosses and lichens. D. Secondary succession includes frequent fires.

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.

sorry, is there a picture? i do not see any arrows.

wut? unius0123 wut?

it is called the mitotic spindle