Which one correctly describe reproduction and life cycle of fern?
Spore → Gamete → Prothallus → Sporophyte
Gamete → Spore → Prothallus → Plant
Prothallus → Sporophyte → Gamete → Fern
Sporangia → Spore → Prothallus → Sporophyte → Plant
C.
Prothallus → Sporophyte → Gamete → Fern
During favourable month sporangia are produced on the underside of the margin of leaves in ferns. After development, it becomes dry and bursts so release spores. These spores germinate on the suitable substrate. Each spore absorbs water, then ruptures and produce gree filament which grows into prothallus (heart-shaped) prothallus develops into young sporophyte which in turn grows into an adult plant.
Pneumatophores occur in
Halophytes
Free-floating hydrophytes
Submerged hydrophytes
Carnivorous plants
Phellogen and phellem respectively denote
Cork and cork cambium
Cork cambium and cork
Secondary cortex and cork
Cork and secondary cortex
Which of the following properties is shown by cytokinins?
Delay leaf senescence
Cause leaf abscission
Promote seed dormancy
Promote stornatal closing
