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biology
Question | Answer |
---|---|
aorta of aves | only right aorta and bends backwards |
rataitae or running birds | penguin hen ostrich kiwi |
features that help aves to fly | feathers air sockets absence of urinary bladder |
eggs characteristics | large with much yolk |
reproduction in aves | internal fertilization lay eggs sexes separate only one oviduct and ovary are functional |
gizzard | crushes food in aves |
what is syrnix | it is the voice box in aves |
respiration and metabolism | endothermic warm blooded respiration by lungs |
body division and parts | head neck trunk tail,neck is long tail is short |
two pairs of pendactyl limbs | forelimbs form wings hind limbs are strong and adapted for perching swimming etc each foot bears 4 toes armed with horny claws |
further structures | skin consists of feathers all over and scales on feet skull has sockets and beak without teeth |
excretory system | cloaca opening two kidney and ureters no urninary bladder semi solid uric acid |