Title: NCERT Solutions For Class 11 Biology Plant Kingdom
Headings: NCERT Solutions For Class 11 Biology Plant Kingdom
NCERT Solutions For Class 11 Biology Plant Kingdom
NCERT Solutions For Class 11 Biology Plant Kingdom
NCERT TEXTBOOK QUESTIONS SOLVED
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Content: The main plant body of bryophyte is gametophytic (n), which is independent and may be thallose (no differentiation in root, stem, leaves) e.g., Riccia, or may be foliose (having leafy axis) e.g., Funaria. The dominant phase in the life cycle of Funaria is the gametophyte, which occurs in two stages, the protonema stage and the erect, leafy gametophytic plant. The leafy gametophyte consists of an upright, slender axis (stem-like) that bears spirally arranged leaves and is attached to the substratum by multicellular, branched rhizoids. Vegetative reproduction takes place
by fragmentation; by the buds formed in secondary protonema etc. The sex organs, antheridia and archegonia are produced in dusters at the apices of the leafy shoots. Antheridia produces antherozoids and archegonia produces egg. Antherozoid (male gamete) and egg (female gamete) fuses and form zygote. Zygote develops into a sporophyte; which is differentiated into foot, seta and capsule and spores are produced in the capsule.