What would cause a decrease in the quality of circulating red blood cells

Which muscle is responsible for inhalation ?

Which organelles are labeled d, and what is one feature that distinguishes them from the other labeled organelles chloroplasts the only organelles that produce sugars from sunlight mosomes, only found in animal and bacterial cells centricles only found in animal cells mitochondra, the only energo-generating structures found in cells

What do transitional fossils best support?