True or false, only one gene is responsible for the phenotype

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

What is the approximate time of death of the body temperature is 29.4 degrees celsius

Modern sea star larvae resemble some primitive vertebrate larvae. this similarity may suggest that primitive vertebrates