Vg-1 and wnt are used in both frogs and chicks to establish a body axis, although in chicks this is the antero-posterior axis instead of the dorso-ventral axis. What is the region of the chick embryo that is thus analogous to the Nieuwkoop center?

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#Question id: 20151

#XL - P Chemistry

Sodium chloride imparts a yellow colour to the Bunsen flame. This can be interpreted due to the

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#Question id: 20152

#XL - P Chemistry

The exact path of electron 2p-orbital cannot be determined.” The above statement is based

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#Question id: 20153

#XL - P Chemistry

The maximum number of electrons in a subshell is given by the expression

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#Question id: 20154

#XL - P Chemistry

If r is the radius of first orbit, the radius of nth orbit of the H atom will be

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#Question id: 20155

#XL - P Chemistry

The energy of hydrogen atom in its ground state is -13·6 eV. The energy of the level corresponding to the quantum number n = 5 is

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#Question id: 20156

#XL - P Chemistry

At 200°C hydrogen molecules have velocity 105 cm sec^–1. The de-Broglie wavelength in this case is approximately