Ecological succession is ______ and ______ change in species composition.
Orderly and sequential
Unpredictable and orderly
Gradual and unsequential
Sequential and disorderly
Given below is a simplified model ofphosphorus cycling in a terrestrial ecosystemwith four blanks $(A-D)$.Identify the blanks.
Choose the area which will take minimum time for succession
The ultimate energy source of ecosystem is
Which one lacks both roots and stomata
Chapparal occurs in area