Gastrulation in sea urchins, Drosophila, and Xenopus all begin with a change in cell shape, in which the apical surface of an epithelial sheet contracts. This process is called:

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#Question id: 19951

#XL - P Chemistry

How many electrons in an atom with atomic number 105 can have (n +l) = 8 ?

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#Question id: 19952

#XL - P Chemistry

The size of the nucleus is approximately

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#Question id: 19953

#XL - P Chemistry

The line spectrum ot two elements is not identical because .

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#Question id: 19965

#XL - P Chemistry

Bohr’s atomic model can explain the spectrum of

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#Question id: 19966

#XL - P Chemistry

The electronic configuration of a dipositive ion M⁺² is 2, 8, 14 and its mass number is 56. The number of neutrons present is

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#Question id: 19967

#XL - P Chemistry

An atom has 2 K, 8 L, 11 M, 2 N electrons, the total number of s-electrons will be