Related Questions

The neural crest cells:
A Is derived from the junctional zone between neural plate ectoderm and embryonic ectoderm
B Gives rise to autonomic ganglia
C Gives rise to adrenal medulla
D Contributes to developing alar lamina
E Gives rise to marginal layer of the neural tube
The derivatives of neural crest cells are
A Cranio-facial skeleton
B Autonomic ganglia
C Melanocyte
D Duramater
E Cortex of adrenal gland
As compared to crest of the normal portion of the weir, the crest of the under sluice portion of weir is kept at
A lower level
B higher level
C same level
D any of the above depending on the design
The ratio of the discharge over a trapezoidal crest to a rectangular crest of Sarda falls of identical parameters, is
A 1.084
B 1.074
C 1.064
D 1.054
A weir is said to be narrow-crested weir, if the width of the crest of the weir is __________ half the height of water above the weir crest.
A Equal to
B Less than
C More than
D None of these
A weir is said to be broad crested weir, if the width of the crest of the weir is ________ half the height of water above the weir crest.
A Equal to
B Less than
C More than
D None of these
The discharge passing over an ogee spillway is given by (where, L is effective length of spillway crest and H is the total head over the spillway crest including velocity head.)
A $${\text{CL}}{{\text{H}}^{\frac{3}{2}}}$$
B $${\text{CH}}{{\text{L}}^{\frac{3}{2}}}$$
C $${\text{CL}}{{\text{H}}^{\frac{5}{2}}}$$
D $${\text{CL}}{{\text{H}}^{\frac{1}{2}}}$$
The depth of the crest of a scouring sluice below the crest of a head regulator, is generally kept
A 0.20 m
B 1.20 m
C 2.20 m
D 3.20 m
Neural crest derivates are
A Melanocyte
B Odontoblast
C Posterior root ganglia
D Infundibulum
E Oligodentrocyte
Derivatives of neural crest are:
A Facial skeleton
B Melanocytes
C Adrenal medulla
D Hepatocytes
E Spinal cord

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