NEET 2016 Biology question

Which of the following would appear as the pioneer organisms on bare rocks?

(1)LichensCorrect
(2)Liverworts
(3)Mosses
(4)Green algae

Answer: (1)

Solution

In primary succession on bare rock (xerarch succession) the pioneer species are crustose lichens; they secrete acids that weather the rock and help in soil formation. They are followed by

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Question ID VK-091991