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Question
Which of the following characteristics feature is found in all birds including flightless birds?
Which of the following characteristics feature is found in all birds including flightless birds?
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Solution
The correct option is B Presence of feather on body
A. All the birds including the flightless birds (which have lost the ability to fly) have a well-developed wing.- The flying birds have large chest muscles that help in the movement of wings whereas, in flightless birds, the flat breastbones lack the carina that anchors the strong pectoral muscles required for flight.
B. All birds have feathers which keep them insulated.
C. The female birds have only one functional ovary (left), few bird species have two functional ovaries connected to the oviduct.D. The oil glands or preen glands are found at the base of the tail in birds.
- It is absent in a few birds such as doves, pigeons etc.
- So, the correct answer is 'Presence of feathers on the body.
A. All the birds including the flightless birds (which have lost the ability to fly) have a well-developed wing.
- The flying birds have large chest muscles that help in the movement of wings whereas, in flightless birds, the flat breastbones lack the carina that anchors the strong pectoral muscles required for flight.
C. The female birds have only one functional ovary (left), few bird species have two functional ovaries connected to the oviduct.
D. The oil glands or preen glands are found at the base of the tail in birds.
- It is absent in a few birds such as doves, pigeons etc.
- So, the correct answer is 'Presence of feathers on the body.
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