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Kingdom Animalia — Bio Zoology STD 11 — Question

Tamilnadu BoardEnglish MediumSTD 11Bio ZoologyKingdom Animalia3 Marks
Question
Write the general characters of the class Amphibia.
✓

Answer

Amphibians are adapted to live both in water and on land.
  • They are poikilothermic.
  • The body is divisible into the head and trunk.
  • They have two pairs of limbs.
  • The skin is smooth or rough, moist, pigmented, and glandular.
  • Eyes have eyelids.
  • Respiration is by gills, lungs, and through the skin.
  • The heart is three-chambered.
  • Kidneys are mesonephric and ureotelic.
  • Sexes are separate and fertilization is external.
  • They are oviparous and development is indirect, e.g. Bufo and Rana.

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