Q. A priority intersection has a single-lane one-way traffic road crossing an undivided two- lane two-way traffic road. The traffic stream speed on the single-lane road is 20 kmph and the speed on the two-lane road is 50 kmph. The perception-reaction time is 2.5 s, coefficient of longitudinal friction is 0.38 and acceleration due to […]
Sporopollenin is Option 1 : Most resistant organic matter knownOption 2 : Present in exine of pollen grainOption 3 : Absent in the germ pole of pollen grainOption 4 : All of these
Exine of pollen is(A) Hard outer layer of pollen grain(B) Most resistant organic matter known.(C) Layer made up of sporopollenin.(D) Layer which can withstand high temperature, strong acids and alkali.(E) Layer which cannot be degraded by any known enzyme. Option 1 : A and BOption 2 : A, B, C and DOption 3 : A,
Q. A rapid sand filter comprising a number of filter beds is required to produce 99 MLD of potable water. Consider water loss during backwashing as 5%, rate of filtration as 6.0 m/h and length to width ratio of filter bed as 1.35. The width of each filter bed is to be kept equal to
Pollen grains are Option 1 : SphericalOption 2 : OvalOption 3 : Generally sphericalOption 4 : Irregular
Q. A closed tank contains 0.5 m thick layer of mercury (specific gravity = 13.6) at the bottom. A 2.0 m thick layer of water lies above the mercury layer. A 3.0 m thick layer of oil (specific gravity = 0.6) lies above the water layer. The space above the oil layer contains air under
Diameter of pollen grain is Option 1 : 20–50 μmOption 2 : 25–50 μmOption 3 : 30–50 μmOption 4 : 10–50 μm
Male gametophyte in angiosperm is represented by Option 1 : AntherOption 2 : AndroeciumOption 3 : MicrosporangiumOption 4 : Pollen grain
Male gametophyte in angiosperm is represented by Read More »
Q. A 0.5 m × 0.5 m square concrete pile is to be driven in a homogeneous clayey soil having undrained shear strength, cu = 50 kPa and unit weight, γ = 18.0 kN/m3. The design capacity of the pile is 500 kN. The adhesion factor α is given as 0.75. The length of the
Pollen grains are Option 1 : Microspore tetradOption 2 : Dehydrated microsporesOption 3 : Megaspore tetradOption 4 : Pollen mother cells
