71.

The correct sequence of plants in a hydrosere is

• Oak → Lantana → scirpus→Pistia→Hydrilla→Volvox

• Volvox → Hydrilla → Pistia → Scirpus → Lantana → Oak
  

• Pista → Volvox → Scirpus → Hydrilla → Oak → Lantana

• Pista → Volvox → Scirpus → Hydrilla → Oak → Lantana

Vegetative propagation in mint occurs by 

• runner 

• offset

• rhizome

• rhizome

Which one of the following is a vascular cryptogam?

• Equisetum 

• Ginkgo

• Marchantia

• Marchantia

Which one of the following is considered important in the development of seed habit?

• Dependent sporophyte

• Heterospory

• Haplontic life cycle

• Haplontic life cycle

Examine the figure A, B, C, and D. In which one of the four options, all the items A, B, C and D are correct.

• A	B	C	D
  Chara	Marchantia	Fucus	Pinus

• A	B	C	D
  Equisetum	Ginkgo	Selaginella	Lycopodium

• A	B	C	D
  Selaginella	Equisetum	Salvinia	Ginkgo

• A	B	C	D
  Selaginella	Equisetum	Salvinia	Ginkgo

Which one of the following is heterosporous? 

• Dryopteris 

• Salvinia

• Adiantum

• Adiantum

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

• the absence of resin duct and leaf venation

• the presence of vessel elements and absence of archegonia

• perianth and two integuments

• perianth and two integuments

Flagellated male gametes are present in all the three of which one of the following sets?

• Anthoceros, Funaria and Spirogyra

• Zygnema, Saprolegnia and Hydrilla

• Fucus, Marsilea and Calotropis

• Fucus, Marsilea and Calotropis

In the prothallus of a vascular cryptogam, the antherozoids and eggs mature at different times. As a result

• there is no change in success rate of fertilization

• there is high degree of sterility

• one can conclude that the plant is apomictic

• one can conclude that the plant is apomictic

Spore dissemination in some liverworts is aided by

• elaters

• indusium

• calyptra

• calyptra