Plant Kingdom
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A prokaryoticv autotrophic nitrogen-fixing symbiont is found in
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Cycas
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Cicer
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Pisum
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Alnus
A.
Cycas
The coralloid root of cycas is symbiotically associated with nitrogen fixing blue -green algae, Anabaena Cycadae and Nostoc punctiforme. These blue-green algae (Cyanobacteria) are prokaryotic, photosynthetic and autotrophic.
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An alga which can be employed as food for human being is
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Ulothrix
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Chlorella
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Spirogyra
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Polysiphonia
B.
Chlorella
Chlorella is an attractive potential food source new-a -days: because it is high in protein and other essential nutrients. When dried, it contains about 45% protein, 20% fat, 20% carbohydrates 5% fibre and 10% minerals along with vitamins. It mainly used as a food supplement for astronauts.
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.
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A
B
C
D
Chara
Marchantia
Fucus
Pinus
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A
B
C
D
Equisetum
Ginkgo
Selaginella
Lycopodium
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A
B
C
D
Selaginella
Equisetum
Salvinia
Ginkgo
-
A
B
C
D
Funaria
Adiantum
Salvinia
Riccia
C.
|
A |
B |
C |
D |
|
Selaginella |
Equisetum |
Salvinia |
Ginkgo |
A -Selaginella
B- Equisetum
C- Salvinia
D- Ginkgo
Flagellated male gametes are present in all the three of which one of the following sets?
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Anthoceros, Funaria and Spirogyra
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Zygnema, Saprolegnia and Hydrilla
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Fucus, Marsilea and Calotropis
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Riccia, Dryopteris and Cycas
D.
Riccia, Dryopteris and Cycas
Flagellated male gametes are present in Riccia, Dryopteris and Cycas.
Gymnosperms are also called soft wood spermatophytes because they lack
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cambium
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phloem fibres
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thick-walled tracheids
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xylem fibres
D.
xylem fibres
Gymnosperms lack xylem fibres. Large amount of parenchymatous cells are present with secondary xylem tracheids. So, these are also known as softwood spermatophytes.
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Mock Test Series
Mock Test Series