What is the cell number in the archaebacteria kingdom? unicellular or multicellular?

Which plains area lies in both the united states and canada? altiplano central canadian shield coastal plains great plains

What initially causes a nerve impulse? release of enzymes out of the neuron movement of chemicals into the dendrites of the neuron pathogens attacking the dendrites of the neuron red blood cells bathing the neuron

Whay is the following best defines climate