Which of the following is true of vertebrates with four-chambered hearts? there is a partial gas exchange in one chamber of the heart. there is a partial mixing of oxygen-rich and oxygen-poor blood. there is no mixing of oxygen-rich and oxygen-poor blood. there is a complete mixing of oxygen-rich and oxygen-poor blood.

There is no mixing of oxygen-rich and oxygen-poor blood.

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The right atrium and right ventricle of the human heart pump oxygen-poor blood to the lungs and the left atrium receives oxygen-rich blood. They never mix.

he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

i hope this : )