The pioneer community in hydrosere is `ul("submerged plants")`.

Biotic community.

The correct sequence of plants in a hydrosere is

The second stage of hydrosere is occupied by plants like

Correct the statements by changing underlined words only: Heterophyly is seen among submerged plants.

Read the given statements about lichens and select the incorrect ones. (i) They represent an example of commensallism. (ii) Algal partner obtains water and mineral salts from the fungus and the fungal partner obtains food prepared by the aiga. (iii) These do not grow in polluted areas. (iv) The mycobiont is usually an Ascomycetes or a Basididiomycetes. (v) The phycobiont is mostly a green alga or a cyanobacterium. (vi) These constitute the pioneer community in case of hydrosere.

Seral community and Climax community

The amphibious stage of a hydrosere is called sedge-meadow stage.

The cleavage in humans is ul("meroblastic") .