Answer:
64.
Explanation:
It is 64 because there are 20 amino acids with four bases ( A,T,C and G).
and genetic code can be read in triplets and also the four bases can occupy the positions. Eachh amino acid can be coded by the triplet codons. A triplet codon shows three nucleotides of the mRNA template that can code for amino acid
Therefore the number of codons is 4×4×4= 64.
The oxygen cycle can be found in all but the geosphere. There's oxygen in the atmosphere, so it has to be there, and the biosphere includes living things, which breathe oxygen, and water (hydrosphere) is made up of partly hydrogen, so there has to be oxygen there as well.
<span>Photosynthesis can be compared to making a collage. You take pictures and sometimes you cut them to fit into the shape your are making. The pictures are the CO2. The glue you use to put the pictures together is the H2O or water. You use H2O and CO2 to form the shape. The thing that makes it possible for the work of art to be created are your hands. Your hands is the light that makes photosynthesis possible.</span>
