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Aves Features Features A. Type of Bones 1. Hollow with air cavities (pneumatic) B. Type of Skin 2. Air sacs connected to lungs C. Special Digestive Chambers 3. Crop and gizzard D. Respiration Support 4. Dry with an oil gland

Options

  1. AA - 1, B - 4, C - 3, D - 2
  2. BA - 2, B - 1, C - 3, D - 4
  3. CA - 1, B - 3, C - 2, D - 4
  4. DA - 4, B - 2, C - 1, D - 3

Correct answer

A. A - 1, B - 4, C - 3, D - 2

Step-by-step solution

Birds have pneumatic bones (hollow with air cavities).Their skin is dry with an oil gland.They have additional digestive chambers: crop and gizzard.Respiration is supplemented by air sacs connected to the lungs.

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