Question

Frog casts off its outer dead skin

• A. On being agitated
• B. When frightened
• C. When hungry
• D. Periodically

Answer 1

Answer: (D)

Periodically

Frog skin showing epidermis (outer layer) and dermis (inner layer).The outer layer contains hardened, dead, keratinized cells, which are cast off periodically. The cells shift to the outer surface and become extremely thin, inactive and ultimately dead to form the outermost layer of epidermis, which is termed as stratum corneum.

So, the correct answer is 'Periodically'.