In which pteridophyte does the stem have a distinct 'siphonostele' with a central pith surrounded by vascular tissue?
Psilotum
Selaginella
Equisetum
Lycopodium
Related Questions
In which pteridophyte does the stem have a distinct 'siphonostele' with a central pith surrounded by vascular tissue?
Psilotum
Selaginella
Equisetum
Lycopodium
In pteridophytes, the antherozoids are characterized by:
Biflagellate and straight
Multiflagellate and spirally coiled
Aflagellate and amoeboid
Uniflagellate and comma-shaped
Characteristic of fern is
Reproduction by seeds
Presence of flowers
Reproduction by spores
Presence of woody tissue
In pteridophytes, gametophytes require …A… to grow
Cool, damp and shady places
Dry places
Terrestrial area
Water
The leaves in pteridophytes are small as in
Volvox
Marsilia
Selaginella
Azolla
Which of the following can be regarded as seedless vascular plants?
Angiosperms
Gymnosperms
Bryophytes
Pteridophytes
In the prothallus of a vascular cryptogam, the antherozoids and eggs mature at different times. As a result
There is no change in success rate of fertilization
There is high degree of sterility
One can conclude that the plant is apomictic
Self-fertilization is prevented
The dominant phase in the life cycle of a pteridophyte is the:
Gametophyte
Sporophyte
Prothallus
Zygote
In pteridophytes, phloem is without
Sieve cells
Blast cells
Companion cells
Bast fibres
Which of the following has multiflagellate sperms?
Equisetum
Riccia
Lycopodium
Anthoceros
