The Living World 8th Edition by George Johnson

تمرين 4

Explain how bacteria, archaea, protists, and many phyla of invertebrates can survive without respiratory organs.
Gills are found in
A) fish.
B) marine arthropods.
C) mollusks.
D) All of the above.
Respiratory organs of invertebrates and vertebrates are similar in that
A) they use negative pressure breathing.
B) they take advantage of countercurrent flow systems.
C) they increase the surface area available for diffusion.
D) the air flows through the organ in one direction.