It is B while cell walls do contain cellulose they do not contain hemicellulose
Cladistics is a way of grouping the related branches based on sharing derived characters within the group. However these characters are not found in other species except by convergence. Phylogeny is a way of tracking evolutionary relationships based on shared characters based on artificially defined levels of taxonomy.
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Mohs hardness scale is a scale comparing hardness of rocks. There are 10 marker rocks 1-10. They are used to find the relative hardness of the other rocks.
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The concentration gradient of oxygen in your lungs wants to flow toward homeostasis and oxygen is bound on red blood cells by hemoglobin, along with the attraction of oxygen to hemoglobin. The concentration gradient from carbon dioxide from the capillary to the lungs. There is more oxygen in your lungs (alveoli) than there is carbon dioxide and everything want to reach homeostasis, or level amounts on both sides.
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