Classification of Animals
Question
Consider the following four statements (A–D) about Aves (birds) and select the correct option stating which ones are true (T) and which ones are false (F).
A. Hindlimbs are without scales.
B. Oil gland is present at the base of the tail
C. Endoskeleton is fully ossified.
D. An air bladder is connected to the lungs.
| A | B | C | D | |
| 1 | F | T | T | T |
| 2 | T | F | T | F |
| 3 | F | T | T | F |
| 4 | F | T | F | T |
Moderate
Solution
In birds, hind limbs generally have scales and are modified for walking, swimming or clasping the tree branches. Skin is dry without glands except the oil gland at the base of the tail. Endoskeleton is fully ossified (bony). Air sacs connected to lungs supplement respiration.
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