Question

Select the incorrect statement w.r.t. birds.
A. Birds have well developed sense of smell and sight
B. Only left ovary is functional in birds
C. Birds lack teeth
D. Keel is usually absent if flightless birds

Answer 1

Birds have a sharp feeling of sight however helpless they are, yet kiwi have a wonderful feeling of smell. Pecten is available according to feathered creatures. Ear openings are available. Every ear comprises three sections: outer, center and interior. Current just as terminated flying creatures, teeth missing, tail short, e.g., Struthio, Aptenodytes (Penguin), Ardea (Gray heron), CAIcedo (Kingfisher), Anas (duck), Columba, Psittacula, Gallus, Tyto, Bubo (Great horned owl), Phoenicopterus (Flamingo).

Complete answer:
Birds have a full scope of faculties, just as visual perception. They can hear, smell and feel their general surroundings - and some have a couple of extraordinary stunts of their own. In practically all types of fowls, including poultry, just the left ovary and oviduct are utilitarian. Despite the fact that the female undeveloped organism has two ovaries, just the left one creates.
The correct one ordinarily relapses during advancement and is nonfunctional in the grown-up winged creature. A fall or carina (plural carinae) in fledgling life structures is an augmentation of the sternum (breastbone) which runs pivotally along the midline of the sternum and expands outward, opposite to the plane of the ribs.
Falls don't exist on all flying creatures; specifically, some flightless winged animals do not have a fall structure. Winged animals don't have teeth, despite the fact that they may have edges on their bills that assist them with holding food. Feathered creatures gulp down their food, and their gizzard (a solid piece of their stomach) crushes the food so they can process it.
Present day birds all lack teeth, aside from the South American hoatzin, Opisthocomus, whose hatchlings have a little tooth that they use to help them escape from their egg and afterward shed.
A keel or carina (plural carinae) in bird’s life systems is an augmentation of the sternum (breastbone) which runs pivotally along the midline of the sternum and expands outward, opposite to the plane of the ribs. The fall gives an anchor to which a bird's wing muscles append, in this manner giving sufficient influence to flight. Falls don't exist on all winged animals; specifically, some flightless birds come up short on a fall structure.

Hence, the correct answer is option (C).

Note: Evolution is muddled, and subsequently, there frequently are different covering reasons that specific qualities are versatile. One such developmental riddle is the explanation that fowls have mouths rather than teeth. Generally, innocuousness in present day feathered creatures was believed to be a variation for flight (ref), since teeth are hefty.