Answer:
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.
Answer:
Charles Darwin came up with the theory of evolution.
Answer:
We can see some of the most important patterns Darwin noticed in distribution of organisms by looking at his observations of the Galápagos Islands off the coast of Ecuador. Darwin found that nearby islands in the Galápagos had similar but nonidentical species of finches living on them.
The right option is ; They destroy pathogens that enter the wound
White blood cells will prevent bacteria on the glass from infecting her blood by destroying the bacteria.
White blood cells are the cells of the immune system that protects the body against infectious disease and pathogens. White blood cells are present in every part of the body including the blood. White blood cells encompass any pathogens in the blood, engulf and break them down so as to destroy them
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Answer:
I think I it is selective breeding also known as artificial selection
