question_answer 27)

  The sequence of communities of primary succession in water is (a) Phytoplankton, sedges, free-floating hydrophytes, rooted hydrophytes, grasses and trees. (b) Phytoplankton, free-floating hydrophytes, rooted hydrophytes, sedges, grasses and trees. (c) Free-floating hydrophytes, sedges, phytoplankton, rooted hydrophytes, grasses and trees. (d) Phytoplankton, rooted submerged hydrophytes, floating hydrophytes, reed swamp, sedges, meadow and trees.

Answer:

                  (d) The sequences of communities of primary succession in hydrosere is phytoplankton (pioneer stage)  rooted submerged hydrophytes  floating hydrophyte(floating stage)  reed swamps sedges meadow and woodland (trees). The other options are wrong.