The first genetic material on earth was probably the first genetic material on earth was probably dna produced by reverse transcriptase from abiotically produced rna dna molecules whose information was transcribed to rna and later translated in polypeptides self-replicating rna molecules oligopeptides located within protocells

the index of refraction of the second medium is higher. i just took the test trust me !

answer: ice crystals in air

the water from the water body or another source of water gets evaporated as water vapor as an effect of heat on water. these water vapor rises in the upper layers of the earth atmosphere under high atmospheric pressure. the atmospheric pressure of these water molecules starts to decrease due to the effect of cold air. the invisible water vapor condenses into visible water droplets and ice crystals.these ice crystals and water droplets being less denser than the surrounding air floats on air as clouds.