Match List-I with List-II. [2023]
List I List II
(A) Pteropsida (I) Psilotum
(B) Lycopsida (II) Equisetum
(C) Psilopsida (III) Adiantum
(D) Sphenopsida (IV) Selaginella
Choose the correct answer from the options given below:
(A)-(II), (B)-(III), (C)-(I), (D)-(IV)
(A)-(III), (B)-(I), (C)-(IV), (D)-(II)
(A)-(II), (B)-(III), (C)-(IV), (D)-(I)
(A)-(III), (B)-(IV), (C)-(I), (D)-(II)
(4)
The pteridophytes are classified into four classes:
Psilopsida (Psilotum);
Lycopsida (Selaginella, Lycopodium);
Sphenopsida (Equisetum);
and Pteropsida (Dryopteris, Pteris, Adiantum).
Identify the pair of heterosporous pteridophytes among the following. [2023]
Psilotum and Salvinia
Equisetum and Salvinia
Lycopodium and Selaginella
Selaginella and Salvinia
(4)
Genera like Selaginella and Salvinia produce two kinds of spores, macro (large) and micro (small) spores, known as heterosporous. The megaspores and microspores germinate and give rise to female and male gametophytes, respectively.
Genera like Selaginella and Salvinia produce two kinds of spores. Such plants are known as [2021]
heterosporous
homosorus
heterosorus
homosporous
(1)
Genera like Selaginella and Salvinia, which produce two kinds of spores, macro (large) and micro (small) spores, are known as heterosporous.
Strobili cones are found in [2020]
Salvinia
Pteris
Marchantia
Equisetum
(4)
The sporophytes of pteridophytes bear sporangia that are subtended by leaf-like appendages called sporophylls. In some cases, sporophylls may form distinct compact structures called strobili or cones, e.g., Selaginella, Equisetum.
In bryophytes and pteridophytes, transport of male gametes requires [2016]
birds
water
wind
insects
(2)
The sperms of bryophytes and pteridophytes are flagellated and hence require an external supply of water to reach archegonia.
