Nails, hoofs and horns are formed by

A. cuticle

B. keratin

C. chitin

D. none of these

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  1. The cells of the stratum lucidum of the skin become hard and the horny layer of cells thus formed become
  2. Sweat glands in mammals are primarily concerned with
  3. Wrinkling of skin in old age is due to
  4. Perspiration is a process, essentially meant for
  5. Modified sebaceous glands around eyes in rabbit are
  6. The layer of cells in the skin which is periodically cast off is
  7. The hair of a mammal is a structure which is
  8. Lacrymal glands are responsible for the secretion of
  9. Structures present in the skin of frog and absent in skin of rabbit are
  10. Nails, hoofs and horns are formed by
  11. Colouration of frog is due to
  12. The skin functions as a storage organ because the deeper layers of dermis store
  13. The skin of frog is attached to the under lying body muscles loosely leaving many
  14. Sebaceous glands are found in
  15. The corium of dermis is a derivative of
  16. The sudoriferous glands of the skin secrete
  17. Large sweat glands are characteristic of >
  18. In frog, the mucous and poisonous glands are found in
  19. The sweat glands in hares and rabbits are seen in
  20. If a cat is deprived of vibrissae, stiff long hair on the snout
  21. Hair originates from
  22. Mammary glands are modified......in mammals
  23. The function of sebaceous glands in mammals is to
  24. In the skin collagen and elastic fibres are abundant in the
  25. Skin of frog is characterized by the ab- I sence of
  26. Parotid glands are
  27. The integument of rabbit differs from that of frog in
  28. Sebaceous glands are present in
  29. The modification of the skin at the terminal part of the dorsal surface of phalanges result in formation…
  30. Prevention of evaporation of water from the skin surface in humans is due to