The allele which has light color appears to be altering transcription and that is why the corresponding mRNA is absent in zebrafish which is homozygous. The protein we can say were absent because mRNA which is being required for protein synthesis it was not present.
If the allele had altered translation, mRNA which is functional would have been present but in the same case, the protein will still be absent.
Producers,consumers,and decomposers are linked because they all have to work together to stay alive the produces will make the energy inside itself then the consumers will eat it then have all the energy the plant had then the consumer will die and the decomposer will beak it down and eat what remains of the animal
i hoped this helped :)
Answer:
mitochondrion / mitochondria coming from the apex.
