Answer:
Protists are eukaryotes, which means their cells have a nucleus and other membrane-bound organelles. Most, but not all, protists are single-celled.
Explanation:
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Carbon is found in the non-living part of the hydrosphere, atmosphere, and Geo-sphere, as carbonate (CaCO3) rocks and dead organic matter, such as humus in soil.
By tar, I think you mean nicotine. (I Hope). It affects the nerve signals that regulate breathing.
The Auricle or Pinna is the visible curvy part which trap sound to be received into the ear canal which is a passage way for sound until it reaches the ear drum which is a piece of tightly stretched skin and the end of the ear canal. The sound waves vibrate the skin which moves the stirrup, anvil and hammer or altogether known as the ossicles. The ossicles' movement the cochlea which has many tiny hairs. Nerves in the hairs pick up the movement which then gets turned into electrical pulses and sent up through the brain via the auditory nerve to be interpreted.
