The diagram represents a food web in a marine ecosystem which statement best describes the role of two populations within this f
ood web? A: Phytoplankton and cod are both producers.
B: phytoplankton and zooplankton are both producers.
C: zooplankton are producers, and phytoplankton are consumers.
D: phytoplankton are producers, and cod are consumers.
I think the answer is rays. You can see rays shooting from the sky, but it isn't matter because it doesn't have weight, only the sun does. Hope this helps!
Codon is a set of DNA or RNA nucleotides so each amino acids are coded by 3 bases. For the specification of 4 amino acids, 12 bases are required. 3*4=12