<span>A secondary succession is a series of changes that happen after a disturbance in an existing ecosystem. Some of these include fires, hurricanes, farming and mining. Since a primary succession is a series of events that happen where no ecosystem previously existed, it can be said that a secondary succession can happen after a primary succession.</span>
<span>The answer is False. Secondary succession is the arrangement of group changes which happen on a formerly colonized, however irritated or harmed environment. Cases incorporate territories which have been cleared of existing vegetation and damaging occasions, for example, fires.</span>
The answer would be 2 placenta. A thin walled sac that surrounds the fetus during pregnancy. The sac is filled with amniotic fluid(liquid made by fetus) and the amnion(the membrane that covers the fetal side of the placenta)
