Animals need a respiratory system because each cell of their bodies is involved in the process of:
A) intracellular digestion.
B) cellular respiration.
C) hormone production.
D) nitrogen fixation.
E) extracellular digestion.
Correct Answer:
Verified
Q7: Which of the following structures protects the
Q8: Aquatic animals, in general, face more of
Q9: _ is a waste product of cellular
Q10: All respiratory systems have all of the
Q11: Sea jellies lack a circulatory system because:
A)they
Q13: Which of the following groups of animals
Q14: Movement of O2 from the outside air
Q15: Which of these animals takes up O2
Q16: Breathing in terrestrial animals is a major
Q17: In the lungs, oxygen moves from air
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