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- #Class 11
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Archegoniophore is present in:
Option: 1
Marchantia
Option: 2
Chara
Option: 3
Adiantum
Option: 4
Funaria
Answers (1)
Classification of Bryophytes -
Bryophytes are divided into three classes
- Hepaticopsida (Liverworts)
- Anthoceropsida (Hornworts)
- Bryopsida (Mosses)
Hepaticopsida:
- Members of this class are also called liverworts.
- Liverworts are mostly found in moist and shady localities.
- The gametophyte can be either thalloid (Riccia, Marchantia) or can have leaf-like appendages in two rows on a stem-like axis (Porella).
- The thallus is dorsiventral, prostate and has unicellular rhizoids (smooth walled and pegged) and multicellular scales known as Amphigastria on the ventral side.
- Dichotomous branching is seen in Riccia and Marchantia.
- Vegetative reproduction is by fragmentation or by the formation of multicellular green structures called Gemmae (Marchantia).
- During sexual reproduction, antheridia and archegonia are formed on the same thallus (Riccia) or on different thalli (Marchantia).
- The sporophyte is usually complete parasite on gametophyte and has no columella. It has foot and capsule or foot, seta and capsule.
- Sterile, unicellular sporogenous cells with spiral wall thickenings known as Elaters are formed in the capsule of some liverworts like Marchantia. These help in Spore dispersal.
Archegoniophore is seen in Marchantia
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