3. What is the difference
between primary ecological
succession and secondary
ecological succession?

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
Primary ecological succession is
changing sequence of communities
the first biological occupation a place
where previously were no living
beings. example, the colonization
and following succession of
communities a bare rock.

Secondary succession is the
changing of communities from
the of a community by
new onein a given . For example,
the ecological of the invasion
of and animals in an
crop or land.