1. The study of birds is called:
   ichthyology
   herpetology
   ornithology
   aviology
   
2. Birds have a ____ heart with _____ circulation.
   3 chambered, double loop
   4 chambered, double loop
   3 chambered, single loop
   4 chambered, single loop
   
3. Birds belong to the phylum ___ and the class ___
   chordata, aves
   vertebrata, aves
   chordata, vertebrata
   aves, chordata
   
4. Which of the following is NOT a key characteristic of birds?
   feathers
   furculum
   hollow bones
   ectothermic
   
5. Which of the following organs is NOT present in birds?
   crop
   cloaca
   intestine
   urinary bladder
   
6. The bird in the picture has legs adapted for:
   wading
   perching
   grasping
   swimming
   
7. The bird in the picture most likely eats:
   small mammals
   fish
   seeds
   insects
   
8. Which of the following pairs is most closely related?
   hawks and ducks
   sparrows and hawks
   pelicans and geese
   bluebirds and robins
   
9. In birds, the crop leads to the:
   intestine
   gizzard
   esophagus
   stomach
   
10. The crop is responsible for:
    storing food
    grinding food
    egg production
    breathing
    

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