What was marshall nirenberg and heinrich matthaei's contribution to our current understanding of the genetic code?
discovery of codons
discovery and extraction of dna
© creation of a model of dna
creation of photo 51
mark this and return
save and exit

Hello!

The answer to your question is A.

Discovery of codons.

~Hope this Helps!~

the correct answer is d

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.