Answer:
Actin and myosin are completely overlapped
Answer:
I am assuming that the mutant cells have mutated beta galactosidase activity hence the relative levels of enzymatic activity would be reduced.
Think about it. Caves are dark, with little to no light. If there's no light, why would you need to see? There are far more important senses than sight in cases like these. Senses such as smell, hearing, and touch.
Hope that helped.
Cells have different uses and functions. There must be differentiation/diversity between cells to form a functional organism.