Question

skin can regenerate effectively even after considerable damage has occurred because cells of the stratum basale cannot migrate to other positions in the skin. fibroblasts in the dermis can give rise to new germinal cells in the epidermis. the epidermis of the skin has a rich supply of small blood vessels. contraction in the area of the injury brings cells of adjacent strata together. stem cells persist in the skin even after injury.

Explanation:

Skin regeneration is possible because stem cells remain in the skin post - injury. These stem cells can differentiate and replace damaged cells. Stratum basale cells can migrate, dermis fibroblasts don't give rise to epidermal germinal cells directly, the epidermis is avascular, and contraction doesn't explain regeneration as the key factor.

Answer:

E. stem cells persist in the skin even after injury.