Explanation:
why u want to know why u disturb ur mind by things which are already written in books
It was used till the 1960s. Hope i helped.
Answer:
Secondary succession is the series of community changes which take place on a previously colonized, but disturbed or damaged habitat. Examples include areas which have been cleared of existing vegetation (such as after tree-felling in a woodland) and destructive events such as fires.
Its a large nuclear pore
so pores :)