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Home Q & A Board Biology-Related Homework Help General Biology
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bah1234 bah1234
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6 years ago
In fish, countercurrent exchange involves water flowing over gills and blood flowing through gill capillaries in opposite directions. This increases gas exchange by creating a(n):
 
  a. larger surface area
  b. osmotic gradient
  c. concentration gradient
  d. reservoir for gas
  e. source of new hemoglobin

Question 2

Both the largest and fastest invertebrates are in which mollusk group?
 
  a. chitons
  b. cephalopods
  c. gastropods
  d. bivalves
  e. cnidarians
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mapmap
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6 years ago
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bah1234 Author
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#2
6 years ago
I wish all teachers could be as helpful as you instead of making us do things the complicated way...
map
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#3
6 years ago
It really depends on the course, never give up
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