HSCs express which type of cell-surface molecule, which is the receptor for stem cell factor (SCF). It is a cytokine that exists in both membrane-bound and soluble forms and the SCF-surface molecules interaction is critical for the development, in adult animals, of multipotential progenitor cells (MPPs).  Which type of surface molecules HSCs express?

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#Question id: 20090

#XL - P Chemistry

Mention number of bonding electron pairs and nonbonding electron pairs in NO₃^- ion

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#Question id: 19566

#XL - P Chemistry

Which of the following forces bind together carbon atoms in diamond?

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#Question id: 20247

#XL - P Chemistry

C₂H₆ (g) + 3.5 O₂ (g) →2CO₂ (g) + 3H₂O (g)

ΔSvap (H₂O, l) = x1 cal K^–1 (boiling point + T₁)

ΔHf (H₂O, l) = x₂

ΔHf (CO2) = x₃

ΔHf (C2H6) = x₄

Hence ΔH for the reaction is –

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#Question id: 19604

#XL - P Chemistry

Which one of them is the weakest?

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#Question id: 3454

#XL - T Zoology

Altruism is favoured when rb - c > 0 where c is fitness cost to altruist, b is fitness benefit to recipient; and r is genetic relatedness. It is under negative selection when