Pick the correct group consisting of all genera exhibiting homospory.

(1) Lycopodium, Psilotum, Selaginella, Equisetum

(2) Equisetum, Pteris, Salvinia, Psilotum

(3) Salvinia, Pteris, Lycopodium, Selaginella

(4) Equisetum, Psilotum, Lycopodium, Pteris

The spreading of living pteridophyte is limited and is restricted to narrow geographical region because of

1. Growth requirements of gametophyte (cool, damp and shady places).

2. Requirement of water for fertilisation.

3. Absence of stomata in leaf and absence of vascular tissue.

4. Both 1. and 2..

The given diagram shows:

A Prothallus is

1. A structure in pteridophytes formed before the thallus develops

2. A sporophytic free living structure formed in pteridophytes

3. A gametophyte free living structure formed in pteridophytes

4. A primitive structure formed after fertilization in pteridophytes

From an evolutionary point of view, retention of the female gametophyte with developing young embryo on the parent sporophyte for some time, is first observed in:

A feature common in gametophyte of both mosses and maximum ferns is-

1. Independent existence

2. Both are monoecious in nature

3. Presence of vascular tissue

4. Both are filamentous

Development of the zygotes into young embryo takes within the female gametophytes in

1. Adiantum.

2. Selaginella.

3. Riccia.

4. Batrachospermum.

In which of the following plants, strobili are not formed?
(1) Equisetum
(2) Cycas
(3) Dryopteris
(4) Pinus

Gametophyte in the pteridophytes is

(i) Small, inconspicuous.
(ii) Long lived, unicellular.
(iii) Mostly photosynthetic thalloid or saprophytic.
(iv) Short lived, haploid.

How many statements are correct with respect to gametophyte?

1. Two 

2.Three

3. Four 

4. One

In pteridophytes, antheridium are present in :- 

1. Leafy gametophyte

2. Prothallus

3. Sporophyll

4. Protonema