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Which of the following is true of Aves? |
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a) |
They are poikilotherms and have a three chambered heart |
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b) |
Tiny pebbles eaten by some birds and are used in crushing |
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c) |
They have 10 pairs of cranial nerves |
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d) |
All of the above |
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Which of the following is true of Aves? |
|
|
a) |
They are poikilotherms and have a three chambered heart |
|
b) |
Tiny pebbles eaten by some birds and are used in crushing |
|
c) |
They have 10 pairs of cranial nerves |
|
d) |
All of the above |
(b)
Aves have two additional chambers to the alimentary canal: the crop and the gizzard. Birds eat tiny pebbles that lodge in the gizzard and help the muscular gizzard in crushing food. Birds have 12 pairs of cranial nerves