Which phase is dominant in the life cycle of Bryophyta and Pteridophyta?
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The phase of a particle at `P_(1) " is " 60^(@)` and the phase of a particle at `P_(2) " is " 780^(@)`. If the distance between `P_(1) and P_(2)` is 1
Correct Answer - B `delta = (2pix)/(lamda) , delta_(2) - delta_(1) = 780 - 60 = 720 = 4pi`
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The minimum distance between two particles similar phase is 10 cm. The time after which given particle comes to same phase is 0.05 second. What is the
Correct Answer - B `v = (lamda)/(T) = (10)/(0.05) = (1000)/(5) = 200`
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Which is the dominant phase in Pteridophytes?
(c) Sporophyte
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Why Bryophyta are called amphibians of Plant Kingdom?
Members of Bryophyta are mostly terrestrial plants which depend on water for fertilization and completion of their life cycle. Hence, they are called ‘amphibians of Plant Kingdom’.
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Give any two examples of Pteridophyta.
Nephrolepis, Selaginella, Azolla, Marsilea, Equisetum, Lycopodium, Psilotum, Dryopteris, Pteris, Adiantum.
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Form the given T-S diagram of a reversible carnot engine, find (i) work delivered by engine in one cycle (ii) heat taken from the source in each cycle
(i) `W_(AB) = - nRT ln.(V_(2))/(V_(1))` `DeltaS =(q_(rev))/(T) = - (W_(AB))/(T)` `rArr - W_(AB) = TDeltaS = 600 xx100` `" "- W_(BC) = -.^(n)C_(v)(T_(1) - T_(2))` `" "- W_(CD) =...
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The hysteresis loss for a specimen of iron weighing 15kg is equivalent at `300Jm^(-3)cycle^(-1)` Find the loss of energy per hour at 25 cycle `s^(-1)`
Let Q be th energy dissipated per unit volume per hystersis cycle in the given sample. Then the total energy lost by the volume V of the sample in time...
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Some cells do not have gap phase in their cell cycle whereas some cells spend maximum part of their life in gap phase.
1. G0 is the phase of the cell cycle in eukaryotes in which many cell types stop dividing. It is also called a quiescent stage. 2. If cells are deprived of...
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Assertion In one half-life of a radioactive substance more number of nuclei are decayed than in one average life. Reason Average life = Half -life/in
Correct Answer - D (d) Average life is more Hence more nuclei decay in one avaerage life .
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Visit to nearest sericulture farm and study the life cycle of silk worm.
1. The life cycle of the silk moth consists of four stages namely, egg, larva, pupa and adult. 2. Thousands of eggs deposited by female moths are incubated artificially to reduce...
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