The myelin sheath covers most of the axon. It is important because it helps to protect the axon and speed up the neuron firing process by decreasing the amount of time in the axon.
Answer:
The need for resources will make the organisms competitive in their ecosystems.
The white dwarf will be surrounded by an expanding shell of gas in an object known as a planetary nebula. They are called this because early observers thought they looked like the planets Uranus and Neptune. There are some planetary nebulae that can be viewed through a backyard telescope. :) I hoped this helped !
Anything that falls from clouds is considered precipitation so the answer is all of the above.
