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Zoology, extra notes

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QuestionAnswer
Telolecithal Eggs rich in yolk like birds go through meroblastic cleavage
Condyle Connection between the skull and first vertebra--in mammals and amphibians there are two, birds have 1.
Mammal jaw One bone as opposed to multiple bones in birds and reptiles.
Hymandibula Joint in fish jaws that went into the middle ear became the culumella auris.
Mammal ear quadrate and articular go into the middle ear forming the incus and the maleus
Reptiles and birds urin Uric acid. (water preservation)
Feathers develop from scales which are ectoderm. There is an upward spiral protrusion
Shaft Stiff central structure of the feathers.
Barbs Structures that are split from the main flags on either side of the shaft
Barbules Further branching of the barbs
Hooks Connect between barbules.
Types of feathers Flight, contour, filoplume, powder,
Created by: YaelNoa
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