The study of birds is called:
Birds have a ____ heart with _____ circulation.
3 chambered, double loop
4 chambered, double loop
3 chambered, single loop
4 chambered, single loop
Birds belong to the phylum ___ and the class ___
Which of the following is NOT a key characteristic of birds?
Which of the following organs is NOT present in birds?
The bird in the picture has legs adapted for:
The bird in the picture most likely eats:
Which of the following pairs is most closely related?
hawks and ducks
sparrows and hawks
pelicans and geese
bluebirds and robins
In birds, the crop leads to the:
The crop is responsible for: