Why is the respiratory system of a bird more efficient than the human respiratory system?
A) The bird respiratory system does not mix exhaled air with inhaled air.
B) A bird lung contains multiple alveoli, which increases the amount of surface area available for gas exchange.
C) The human respiratory system ends in small parabronchi, which reduce the amount of surface area available for gas exchange.
D) Only B and C are correct. E) A, B, and C are correct.
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In 2015, about ten percent of total u.s. energy consumption was from renewable energy sources. renewable energy plays an important role in reducing greenhouse gas emissions. when renewable energy sources are used, the demand for fossil fuels is reduced. sanjay and his family want to cut back on their use of non-renewable resources at home. they are thinking of an alternate way to heat their home without adding more greenhouse gases or pollutants to the environment. which renewable resource would not fit into their plan? a) solar power b) burning wood c) constructing a wind turbine eliminate d) generating hydroelectric power
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Why is the respiratory system of a bird more efficient than the human respiratory system?
A) The bi...
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