Abeka Grade 10 Biology Quiz 26

Front 1

Bird blood is distinguished from mammalian blood by _____.

Back 1

nucleated red blood cells

Front 2

The stiff central shaft or quill of a feather is the ____.

Back 2

rachis

Front 3

The clear eyelid that covers a bird's eye is the ____.

Back 3

nictitating membrane

Front 4

The fight pattern in which a bird spirals higher and higher without flapping is _____.

Back 4

soaring

Front 5

A bird's voice box is the _____.

Back 5

syrinx

Front 6

When a bird inhales, the air passes through the trachea into the ____.

Back 6

air sacs

Front 7

Soft, fluffy feathers that lie close to a bird's body and help to keep it warm are _____ feathers.

Back 7

down

Front 8

The muscular organ within the digestive tract of birds that grinds food into small particles for digestion is the ____.

Back 8

gizzard

Front 9

The special sac in the esophagus that serves as a storage chamber and releases food to the rest of the digestive system at the proper rate is the ____.

Back 9

crop

Front 10

A bird's "thumb" is called the ____.

Back 10

alula