The zygote of pteridophyte (A) Undergoes reduction division just after formation (B) Produces multicellular gametophyte (C) Produces multicellular sporophyte (D) Remains dormant

If gametes are produced after reduction division, they are termed as

Plants like bryophytes, pteridophytes, gymnosperms and angiosperms are similar in (a) medium used for transfer of male gametes (b) producing morphologically district gametes (c) having internal fertilization (d) Formation of embryo

Read the following statements and find out the incorrect statements. a. Ovules generally differentiate single megaspore mother cell (MMC) in the chalazal region of the nucellus. b. The MMC undergoes reduction division and produces four megaspores. c. In a majority of angiosperms, one of the megaspore is degenerated while the other three remains functional. d. The nucleus of the functional megaspore divides mitotically three times and form 2-nucleate, 4-nucleate and later 8-nucleate stages of the embryo sac. e. These mitotic division are strictly free nuclear, that is, nuclear division are immediately follwed by cell wall formation.

Beginning with germination of spores in life cycle of Dryopteris, what is the sequence of structures that develop after germination? (a) Dioecious prothallus (b) Sporophyte plant (c) Sex cells (d) Gametophyte (e) Embryo (f) Zygote

Read the following statements w.r.t. bryophytes. (a) They are homosporous. (b) They are first embryophytes. (c) Zygote does not undergo equational division. (d) Water acts as transfer medium for antherozoids to reach the archegonia. (e) In mosses, spores germinate to form filamentous gametophyte. Select the correct option.

Which of these plants is correctly matched with its reproductive characteristics ? (i) Sphagnum : Male sex organ called antheridium produce biflagellate antherozoids while the female sex organ called archesporium produces a single egg . (ii) sequoia : One of the megaspores enclosed within the megasporangium develops into a multicellular female gametophyte that bears two or more archegonia or female sex organs (iii) Wolffia : one of the male gametes fuses with the egg cell to from a zygote while the other male gamete fuses with the diploid secondary nucleus to produce the triploid primary endosperm nuclelus . (iv) polysiphonia . Sexual reproduction is oogamous with non-motile gametes and accompanied by complex post-fertilization developments