Exam 27: Birds

Discuss the evolution of birds as it is currently understood.Why would some theropod dinosaurs have feathers? Did feathers evolve just once? Did feathers evolve specifically for flight? Is Archaeopteryx really a bird?

Birds have what type of red blood cells?

Trace the air flow through a bird from inhaling to exhaling,indicating where absorption of gases occurs and for what percent of the time.Why does it take two cycles of breathing to move a molecule in the air through this system?

The exchange region in the bird lung is tube-like ________ through which air flows continuously.

Anyone who has washed a car knows that bird wastes are different from mammal feces and urine.This is because

The thick thigh and skinny lower leg of a bird,as in the case of a chicken leg,is an advantage because it

Where would you locate the Supracoracoideus and pectoralis muscles of a bird?

More than 90% of all birds follow a type of mating system in which an individual mates with only one partner each breeding season,called ___________.

The most complex and delicate muscles in a bird are located in the

Most paleontologists agree that birds descended from a lineage of dinosaurs called ___________.

Why have birds not evolved a wing design that allows for the best of all properties including fast and slow flight,soaring and flapping,all in one bird?

Evidence indicates that birds are the sister group of the

Discuss the derived characters shared by birds with theropods such as Velocirapor.How do the newly discovered Chinese fossils such as Protarchaeopteryx,Caudipteryx,and Sinosauropteryx fit into the evolutionary picture of birds?

Predatory,land-soaring birds have wing types that are referred to as ______________ wings.or

Which is NOT one of the general features that make birds and reptiles similar?

The geological age when birds first arose is called ____________.

The ___________,a group of small feathers on the first digit (or "thumb")of the bird's wing,functions to prevent stalling at low flight speeds.

Which type of feather disintegrates as it grows,releasing a talc-like substance to waterproof the feathers?

What is the function of the large sheet-like pectoralis muscles of a bird?

Archaeopteryx is