Q. Which one of the following statement is correct ? (a) Stem cells are specialized cells (b) There is no evidence of the existence of gills during embryogenesis of mammals…
Q. Industrial melanism as observed in peppered moth proves that : (a) The true black melanic forms arise by a recurring random mutation. (b) The melanic form of the moth…
Q. The concept of chemical evolution is based on : (a) Crystallization of chemicals (b) Interaction of water, air and clay under intense heat (c) Effect of solar radiation on…
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