Viroids are small single stranded RNA molecules and are found in plants only. Hope this helps.
Ophthalmoscopy is an<span> assessment technique</span> of the posterior area of the eye which includes the retina, optic disc, choroid, and blood vessels.
The body is made to adapt; so it tries to adapt to its current environment. The breathing rate increases to help add more oxygen into the system, slowly boosting endurance as a survival mechanism from ages ago when we actually had to outrun predators. It was likely more efficient back then.
The Circulatory System delivers oxygen and nutrients in the blood to the surrounding cells to maintain Homeostasis. The blood in the Circulatory System is needed throughout the body so that other systems work properly. Like for instance the Nervous System has the brain, and the brain needs blood to function.
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Biosphere is the correct answer! I am glad to help! :)
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