Which part of the neuron sends messages to other neurons by receiving an action potential and then opening

If someone could do the first couple, just so i can see how it's done that would be great! 20 points. complete a dichotomous key for the 10 leaves on the common leaves sheet. the chart provided here allows for 11 pairs of statements. depending on how you build your dichotomous key, you may or may not need all of them, or you may need to add some.

Awave has a wavelength of 15 mm and a frequency of 6 hertz. what is its speed?

Long-period comets come from the oort cloud particles in earth’s atmosphere material from the asteroid belt the kuiper belt