Birds Flashcards
There are approximately \_\_\_\_\_\_\_\_ species of birds known. A) 1,000 B) 2,000 C) 4,000 D) 9,700
D) 9,700
Which of the following is not a characteristic of all species of birds? A) flight B) ovipary C) feathers D) four-chambered heart
A) flight
Why might you surmise that few birds eat leafy vegetative material?
It’s too low in calories
What birdlike characteristics does Archaeopteryx possess? A) teeth B) a long tail C) feathers D) claws on their front appendages
C) feathers
The paleognathids include ____.
rather large flightless birds
The neognathid birds include ____.
some flightless birds
Flightless neognathid birds typically would be found \_\_\_\_. A) in the prairies of North America B) in the polar regions C) on islands D) in Africa
C) on islands
The \_\_\_\_\_\_\_\_ of modern birds is/are relatively long when compared to reptiles. A) neck B) ribs C) tail D) caudal vertebrae
A) neck
The archosaur group that is most closely related to the ancestor of the birds includes the \_\_\_\_. A) saurichians B) theropods C) ornithishians D) pterosaurs
B) theropods
The great adaptive radiation of modern birds occurred during the \_\_\_\_. A) Devonian B) Cenozoic C) Tertiary D) Permian
C) Tertiary
In birds, urinary wastes are ____.
combined with fecal matter
Birds that are active immediately after hatching are known as \_\_\_\_. A) altricial B) precocial C) cambered D) polygynous
B) precocial
The vertebrae of birds that are most freely movable are the \_\_\_\_. A) cervicals B) thoracics C) lumbars D) sacrals
A) cervicals
The stomach of birds includes the ___, a structure particularly adapted for grinding food.
Gizzard
Birds lack alveoli, but rather possess, ________ which are one of the sites of oxygen uptake in the lung of the bird.
parabronchi
The \_\_\_\_\_\_\_\_ is the part of a bird's eye that is the area of keenest vision, and some birds have two of them. A) pecten B) fovea C) cochlea D) tectum
B) fovea
Along with an ability to sense the earth’s magnetic field, birds also find their way during migration by ____.
visual cues
What is the sequence of events in bird reproduction?
fertilization, addition of albumin, formation of shell
Most birds practice seasonal \_\_\_\_\_\_\_\_ due to the necessity of caring for the young. A) polyandry B) monogamy C) polygyny D) polygamy
B) monogamy
Fossils of early birds date back to approximately ___ million years ago.
150
The feathers and leg scales of birds are ______ in origin.
epidermal
Birds have three bones in the middle ear. True or False
False
The portion of the bird feather that emerges from the skin follicle is known as the _____
Quill
The most minute structure of a contour feather is the vane. True or False
False
Compared to mammals, the __________ of birds is relatively undeveloped.
cerebral cortex
The _____ is a set of feathers on the first digit, which allows a slot on the wing.
alula
