7 possibilities total 3 steps.
<h2>A) Alpha Decay</h2><h2 /><h2>Your Welcome :) </h2>
The correct answer is C. Virus.
Virus falls on the gray area which is between nonliving and living things.
Virus is referred to as the small infectious agent which replicates only inside the living cells. Virus can infect life forms plants and animals and microorganisms, for example, archaea and bacteria.
They live in form of independent particles which are referred to as virions. Some viruses can evolve from plasmids.
Neurone X should be motor neurone.
Motor neurone should be the type of neurone after relay neurone. Impulses travel from the relay neurone then to the motor neurone, and the motor neurone passes messages for the effectors usually in reflex actions, where effectors can be muscles or glands.
