question_answer 48)

  Growth of lichens on barren rocks is followed by the growth of (a) moss                               (b) ferns                              (c) gymnosperms              (d) algae

Answer:

  (a) Licheus are the pioneer of succession which produce acid to errode the barren so etc. Most lichens grow on stable rock surfaces or the bark of old trees. They are an important part of soil stabilization and help to retain water in the soil. This enables masses to grew an the soil after lichen which is then followed by gymnosperms.