Nails, hoofs and horns are formed by

A. cuticle

B. keratin

C. chitin

D. none of these

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  1. The keratin of the integument is
  2. Parotid glands are
  3. The skin functions as a storage organ because the deeper layers of dermis store
  4. Prevention of evaporation of water from the skin surface in humans is due to
  5. The function of sebaceous glands in mammals is to
  6. Perspiration is a process, essentially meant for
  7. The integument of rabbit differs from that of frog in
  8. Sweat glands are confined to external ears in
  9. Mammals lack mucous glands in the skin because
  10. Sebaceous glands are present in
  11. Glands of Zeis are associated with the eye lashes. These are modified
  12. Mammary glands are modified......in mammals
  13. If a cat is deprived of vibrissae, stiff long hair on the snout
  14. The sudoriferous glands of the skin secrete
  15. Large sweat glands are characteristic of >
  16. Hair originates from
  17. The layer of cells in the skin which is periodically cast off is
  18. Wrinkling of skin in old age is due to
  19. A type of skin gland which is well developed and functional in females, but non-functional and vestigeal…
  20. Colour in skin of frog is due to
  21. The hair of a mammal is a structure which is
  22. In frog, the mucous and poisonous glands are found in
  23. In the skin collagen and elastic fibres are abundant in the
  24. The skin of frog is attached to the under lying body muscles loosely leaving many
  25. Sebaceous glands are found in
  26. Skin of frog is characterized by the ab- I sence of
  27. The skin in man is thickest at
  28. The sebaceous glands of skin are as- I sociated with the
  29. The part of the hair, in which the hair I shaft is lodged, is called as
  30. Scales in sharks are