The waxy coating is a lipid that can help prevent excess water loss in dry environments.
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Answer:
The left hemisphere. It's a pretty broad answer but yea
The left side of your brain controls the right side of your body
In order for offspring to have a dominant mutation, they need at least one copy of the allele from either or both parents. So yes, at least one of the parents must have the mutated gene in order for the offspring to have the mutation.
For your second question, I'm not quite sure what you mean so I will restate two possibilities for what I think you mean:
1. The offspring does not have the mutation if none of the parents have the mutated gene: this is correct.
2. If the mutation is recessive and the child has only one copy of the mutated allele, then the child will not show the mutation. If none of the parents had the mutated gene, then it would not be possible for the child to have the mutated gene or show it.
Bioluminescenct organisms exist in deeper ocean depths because the light is unable to reach them.