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.
2hrs is the answer I guess so.
Mutation is random because there is really no way of knowing whether a child will inherit it, whereas natural selection is predisposed in either parent.
Those trees cannot grow unless they are part of a larger, inter-connected community
each Interconnected communities usually benefit support the living of other organism simply by doing its own daily activities. Without it, it's hard for some organisms to survive on their own