Choice B is the correct answer, and if not B then D!
They move across a synapse
Answer:
Domain Eukarya have cells with a nucleus.
The Eukarya differ from the Archea and Bacteria in that their cells are eukaryotic, meaning they contain a membrane enclosed nucleus and other membrane enclosed organelles.
They are measuring the liquid's VISCOSITY
You did not give me a picture of the brain, however the three parts of the are the brain stem, cerebellum, and the cerebrum.
The brain stem is located at the bottom in tube-like thingie that runs down the brain.
The cerebellum is located at the back of the brain near the bottom.
The cerebrum is the brain itself (the squishy part).
Photos are provided.