They are alike cause you need them to build upon like bricks.
A !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
Different numbers of neutrons
Answer:
In secondary succession, a previously occupied area is re-colonized following a disturbance that kills much or all of its community. A classic example of secondary succession occurs in oak and hickory forests cleared by wildfire. Wildfires will burn most vegetation and kill animals unable to flee the area.