Answer:
four codon in mRNA sequence code for serine aminoacid.
Explanation:
UCA
UCG
UCC
UCU
these four codons code for aminoacid serine.
Answer:
There is little to no sunlight in the aphotic zone.
Explanation:
The aphotic zone is the deepest part of a lake/ocean, so no light is able to penetrate into those depths. Without light, photosynthetic organisms will not be able to undergo photosynthesis and will therefore not be able to survive.
