Exam 19: Birds

Bird species far outnumber all other vertebrates except the

Domesticated fowl aside,the starlings and the _____________ have become the two most abundant bird species on Earth,due to introduction to various countries.

The integration of muscle-position sense,equilibrium sense,and visual cues for movement and balance occurs in the __________ of the bird's brain.

Like modern birds,Archaeopteryx had a sternum and a furcula.

A unique feature of the respiratory system in birds is the extensive system of nine interconnecting ____________.

Birds,like mammals,have non-nucleate,biconcave erythrocytes.

Flying birds with keeled sternums are known as ___________.

The reason that the majority of birds are polygamous is that both parents are required for care of the young. Multiple Choice Questions

The famous fossil bird that supports the theory for the reptilian ancestry of birds is ____________,a name that means 'ancient wing.'

Because of the demands of flight,the circulatory system of birds is very different from that of mammals.

The supracoracoideus muscles raise the wings in flight.

The wing of a modern bird shows fusion and reduction of skeletal elements.

In flapping flight,the feathers at the wing tips that generate thrust are the ___________ feathers.

Newly hatched birds that are covered with down and are active within a short time after hatching are called _____________.

The large breast muscle that depresses the wing during flight is the _________.

An example of a bird with soaring wings is

Declines of waterfowl in the U.S.may be attributed to accidental ingestion of _______.

The bird feather consists of barbs with barbules that bear tiny hooks that interlock.

A wing slot placed along the leading edge of the wing helps to prevent stalling at low speeds.

The movement of air over the upper curved surface of the wing causes