Multiple Choice Questions'Clamp connections' are observed in
Basidiomycetes
Zygomycetes
Ascomycetes
Oomycetes
A.
Basidiomycetes
'Clamp connections' are observed in Basidiomycetes. These occur during the nuclear division of the dikaryotic cell. Their main function is to ensure that the sister nuclei of the dikaryon seperates into daughter cells.
Torula stage is observed in Zygomycetes. It produces a hypha, promycelium with terminal sporangium.
In Oomycetes hyphal wall consists of glucans and cellulose.
In Ascomycetes, spore of sexual stage is known as ascospores and are endogenous in origin. They are produced within sac like structures called asciwhich vary in shape.
Most accepted theory for ascent of sap is
capillary theory
root pressure theory
pulsation theory
transpiration pull
Which of the following is not the feature of gymnosperms?
parallel venation
perennial plants
distinct branches (long and short branches)
xylem with vessels
Which of the following is/ are grouped under phanerogams?
Angiosperms
Gymnosperms
Pteridophytes
Both (a) and (b)
Which of the following theory gives the latest explanation for the closure of stomata?
ABA theory
Munch Theory
Starch glucose theory
Active K+ transport theory
The trisomy for 21st chromosome is called
Down's syndrome
Turner's syndrome
Sickle cell anaemia
Klinfelter's syndrome
Which is correctly matched?
Apiculture - Honey bee
Pisciculture - Silk moth
Sericulture - Fish
Aquaculture - Mosquito
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