Okay, I would bend over backwards! :)
Leeuwenhoek was inspecting things under his artifial magnifying instrument and found single-cell living beings that he alluded to as protists.
It’s true. I don’t know what else to add
Answer: The postsynaptic cells has many synapses with many presynaptic neuron.
Synapse can be defined as a structure that
allow neuron to send a chemical or electrical signal to another neuron.
However, postsynaptic potential is a temporary change in the electrical
polarization of the membrane of a nerve cell and they are known to be receiver
of neurotransmitter message.
A ruler will not be needed due to having a graduated cylinder which can help measure the volume of liquids