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Home Q & A Board Biology-Related Homework Help General Biology
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Eye_opener Eye_opener
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6 years ago
Which of the following lists the correct order of tracheal system structures, from most external to most
  internal?
 
  a. spiracles, tracheae, tracheal branches, tracheoles
  b. tracheoles, tracheae, tracheal branches, spiracles
  c. tracheoles, tracheal branches, tracheae, spiracles
  d. spiracles, tracheal branches, tracheae, tracheoles
  e. spiracles, tracheoles, tracheae, tracheal branches

Question 2

Countercurrent exchange allows for the removal of ____ of O2 from water flowing over gills.
 
  a. 5060 percent
  b. 6070 percent
  c. 7080 percent
  d. 8090 percent
  e. 90100 percent
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carelesslycoolcarelesslycool
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#1
Posts: 342
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6 years ago
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Eye_opener Author
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6 years ago
This helped my grade so much Perfect
vanna2014
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Yesterday
Correct Slight Smile TY
annabananerz
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2 hours ago
I appreciate what you did here, answered it right Smiling Face with Open Mouth
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