Acetylcholine is the neurotransmitter that sends signals along synapses which will keep creating action potentials in nerves so that signals are passed to the muscle cells (effectors)
Special cells in the skin<span>, called melanocytes, make two different types of melanin, eumelanin and pheomelanin. ... Melanin helps </span>protect our skin<span> and hair by filtering out potentially harmful ultraviolet (UV) radiation from the </span>sun. The UV light from thesun<span> can </span>damage DNA<span> and cause cancer</span>
Answer:
They can use sound to see which ones do not react properly
Explanation:
C. These Animals Have A recent Common Ancestor