The expression of certain genes at different levels may cause color variation in the butterfly wings.
<h3>What is gene expression?</h3>
Gene expression is the cellular process associated with the transcription of certain genes in particular cell types.
In this case, the trait color in butterfly wings is associated with the differential expression of certain genes during development.
The variation in color may be due to the expression of different alleles in butterflies or the same allele at different levels.
Learn more about gene expression here:
brainly.com/question/20682055
Deletion because it worse then a substitution since your deleting something
"Excretory Process" is the process which removes wastes
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Cows because theyer and manewer contains methane witch can power generators
Second option- because if there is too much of the owls, it will be imbalanced and the mouse population will go down
