I believe it's A, but I could be wrong. I apologize if I am so. I will do further research and get back to you
The respiratory system is a collection of organs involved in carrying out gas exchange in your body. Deep in the lungs, tiny sacs called alveoli take in oxygen from the atmosphere and release carbon dioxide.
Complex sugars are called polysaccharides. The correct answer is C. The Latin prefix poly- means many, so the entire name of this saccharide means that there are many atoms of sugar in it, which makes it a complex sugar. Di- in disaccharide means 2, and mono- in monosaccharide means 1, neither of which is complex.
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Here's three just in case. The three core principles of evolution – variation, heredity, and differential fitness – crystalized in the 1970s, still serve as a conceptual benchmark for the theory of evolution by natural selection.
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