Which of the following effects would you expect if red blood cells were shaped like neurons?

they would not be able to move as easily through capillaries.
they would more easily carry out gas exchange in the alveoli.
they would not need to be transported through the body.
they would become more effective at picking up urea discarded by body cells.

They would not be able to move as easily through capillaries.

Explanation:

The red blood's shape allow them to deformate from a disk to a paraboloid when they travel across capillaries , a neuron's shape wouldn't allow this deformation and therefore blood cells with neuron shape wouldn't reach all places to exchange gases.

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not sure if this is what you'r looking for eubacteria and archaebacteria