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Author Question: One of the parallel filaments projecting from a bird's main feather shaft is called a(n) ... (Read 30 times)

brutforce

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on: Jul 18, 2018
One of the parallel filaments projecting from a bird's main feather shaft is called a(n) ___________________ _.
 Fill in the blank(s) with correct word

Question 2

____________________, tiny passages in birds' lungs, are the primary sites of gas exchange between the air and blood.
 Fill in the blank(s) with correct word


honnalora

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Reply #1 on: Jul 18, 2018
Answer to Question 1

barb

Answer to Question 2

Parabronchi


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