Multiple Choice QuestionsThe 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
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
B.
Salvinia
Heterospory is the production of spores of two different sizes and two different developmental patterns. Small spores are called microspores and larger as megaspore. Microspores germinate to produce the male gametophyte or microgametophyte that bear male sex organs while megaspores germinate to form female gametophyte or megagametophytes that bear archegonia or female sex organs. It is most important evolutionary development in the vascular plants because it has ultimately lead to seed development eg, Selaginella, Marselia Salvinia, Azolla, isoetes.
Dryopteris is homosporous a 32-64 haploid spores are produced in each sporangium.
Adiantum is also homosporous. The spores are the pioneer structures of the gametophytic generation.
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
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