Economic importance of bacteria

Describe the structure of RNA virus with suitable diagram.

Draw the labelled life cycle of a heterosporous pteriodphyte.

‘Algae can be found in diverse type of habitats’. Justify the statement.

Only through labelled diagram show:

a) Vertical transverse section of a thallus of Marchantia.

b) L.S. capsule showing annulus and apophysis with stoma of Funaria.

c) T.S. of a young root Pinus sp. after secondary growth has been established.

d) T.S. of coralloid root of Cycas sp.

Compare the structure of mycelia of Penicillium and Agaricus.

Discuss the adaptive strategies developed by aqueous plants during the phase(s) of transition to land habitat.