Excitatory stimuli generally cause the membrane potential of a neuron to O move closer towards an action potential
O none of these
O move further away from an action potential
O has no effect on membrane potential

Nucleus is the organelle that contains chromosomes

Idont see a question here

When a virus infects a host cell, it uses the cell's machinery to make copies of its own genetic material in a process called replication. finally, during the process of self-assembly, that protein shell and the copies of the virus's genetic material are assembled into new viruses.