Answer:it's C and D
Explanation:it showed the answer
Answer: i need this answer also
Explanation:
Answer:
A simple definition of biology is .
Biology is study of living organisms, And divided them in a proper species , division of their cell , and body inner texture is bilogy
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Answer:
B. External respiration
Explanation:
Respiration means transport of oxygen to the cells within tissues, and the transport of carbon dioxide in the opposite direction.