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Genetics and Probability › ViewWhich of the following shows homozygous alleles?
A. Ww
B. ww
Respiration in Organisms › View
Explain the gas exchange mechanism in humans.
A. Gas exchange happens in the skin, allowing for breathing through pores.
B. Oxygen is released from the blood in the kidneys and carbon dioxide is absorbed.
C. Gas exchange in humans occurs in the alveoli of the lungs, where oxygen is absorbed into the blood and carbon dioxide is released.
D. Gas exchange occurs in the stomach where nutrients are absorbed.