Which Feature of Some Carinates Has the Same Effect on Weight

question 58

Multiple Choice

Which feature of some carinates has the same effect on weight as the presence of air sacs?

• A) presence of a large, heavily keratinized beak
• B) absence of a urinary bladder
• C) presence of a carina (keel)
• D) number of chambers in the heart
• E) presence of large pectoral muscles

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