Which of the following are homosporous pteridophytes?

I. Selaginella

II. Lycopodium

III. Salvinia

IV. Equisetum

• I and IV only

• II and III only

• II and IV only

• III and IV only

'Club moss' is the common name of

• Selaginella

• Funaria

• Potamogeton

• Lycopodium

'Gymnosperm' have how many species?

• 1000

• 900

• 640

• 300

Assertion: Endomycorrhiza of forest trees contribute to the efficient nutrient cycling in tropical forest ecosystems.

Reason: The fungi that formendo-mycorrhizal associations with plants make nutrient ions available to them.

• If both assertion and reason are true and reason is the correct explanation of assertion.

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

The lack of fruit formation in gymnosperm is due to

• absence of fertilization

• lack of seeds

• naked ovule

• sheding of immature seed

Select the mismatched pair out of the following

• Rhizome - Dryopteris, Nelumbo nucifera

• Corm - Crocus sativus, Amorphophallus

• Sucker -Curcuma domestica, Zingiber officinale

• Tuber -Helianthus tuberosus, Solanum tuberosum

Match the following and select correct option.

  Column1        Column2

A. Pteris           1) Gymnosperm

B. Cycas           2) Bryophyte

C. Sphagnum    3) Algae

D. Sargassum   4) Pteridophyta

• A-(4), B-(2), C-(1), D-(3)

• A-(4), B-(1), C-(2), D-(3)

• A-(2), B-(3), C-(4), D-(1)

• A-(1), B-(4), C-(3), D-(2)

Pick the correct group consisting of all genera exhibiting homospory

• Lycopodium, Psilotum, Selaginella, Equisetum

• Equisetum, Pteris, Salvinia, Psilotum

• Salvinia, Pteris, Lycopodium, Selaginella

• Equisetum, Psilotum, Lycopodium, Pteris

Pneumatophores (respiratory roots) are found in

• Pistia

• Calobranchia

• Rhizophora

• All of these

Select one of the following pairs of important features distinguishing Gnetum from Cycas and Pinus and showing affinities with angiosperms

• Perianth and no integuments

• Embryo development and apical meristem

• Absence of resin duct and leaf venation

• Presence of vessel elements and absence of archegonia