MODEL PAPER 7 — BIOLOGY STD 11 Science — Question

Main characteristics of pteridophytes:
i. Fern plant is a sporophyte.
ii. It is divided into root, stem, and leaves.
iii. They have vascular tissues xylem and phloem.
iv. Sporangia are formed in the leaves. The sporangia bear spores which are haploid.
v. Spores germinate and form gametophyte which is known as prothallus.
vi. Prothallus possesses sex organs archegonia and antheridia.
vii. They do not form seeds.
viii. Alternation of generation is an important feature.
ix. Examples are Ferns, Dryopteris (a garden fern), Pteris and Nephrolepis, etc.