14. Bird identity card. How are
birds characterized according
to examples of representing
beings, basic morphology,
skin, respiration, circulation,
nitrogen waste, thermal
control and types of
reproduction?

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
Examples of representing :
chickens, sparrows, parrots, ,
penguins. Basic morphology:
body, feathers, pneumatic
, horny beaks. Skin:
keratinized, feathers, uropygial .
Respiration: pulmonary. Circulation:
and complete, heart four
chambers. Nitrogen : uric acid.
Thermal : homeothermic. Types
of : sexual, internal
fecundation, eggs with
extraembryonic .