Since genes are passed down in every organism, properly maintaining and regulating these genes help the organism not receive any disadvantageous mutations, and make sure the organism grows properly
The regulation of gene expression conserves energy and space. It would require a significant amount of energy for an organism to express every gene at all times, so it is more energy efficient to turn on the genes only when they are required.
Polar bears are listed in red as they are belong to Endangered Species. These species are gonna extincting due to gradual changes by environmental factors.
