Class Aves

Question 1

Class aves

Answer 1

Birds

Question 2

Bird characteristics (6)

Answer 2

Feathers (not all can fly)
Leg scales
Forelimbs- flying
Hindlimbs- perching, walking, swimming, hunting
Beak- highly adapted
No teeth

Question 3

How many heart chambers does a bird have?

Answer 3

4 chambered heart

Question 4

How does a bird breath?

Answer 4

Lungs and air sacs for respiration

Question 5

Bird eggs?

Answer 5

Dioecious
Amniotic egg with calcareous
Shell- external incubation

Question 6

Endothermic

Answer 6

Warm blooded
Maintains warm and fairly constant body temperature in any environment

Question 7

Ratites

Answer 7

Large, flightless
Flat sternum
Poorly developed pectoral muscles
Well developed legs

Question 8

Example of ratites

Answer 8

Ostrich
Kiwi

Question 9

Carinates

Answer 9

Flying birds
Keeled sternum
Well developed flying muscles including pectorals

Question 10

Carinates example

Answer 10

Turkey
Hawk
Duck

Question 11

Monogamy

Answer 11

Individuals mate with only one partner per breeding season

Question 12

What monogamy species mates for life?

Answer 12

Eagle

Question 13

Why is monogamy good?

Answer 13

Mates helps only one female defend nest and feed young

Question 14

Polygamy

Answer 14

Two or more partners each breeding season

Question 15

Polygyny

Answer 15

Male mates with more than one female
Males compete for females
Females want to mate with dominant male so that offspring will have genetic advantage

Question 16

Example of precocial young

Answer 16

Ducks

Question 17

Precocial

Answer 17

Covered with down when hatch
Can swim, run as soon as plumage is dry
Nest on ground where newly hatched young are more vulnerable to predators

Question 18

Example of altricial young

Answer 18

Robins

Question 19

Altricial

Answer 19

Young hatch naked and helpless
Remain in nest for a week or more
Species nest higher up