Answer:
A because it is geneticly passed down
The primary distinction of being an animal is the level of intelligence. Humans are considered animals.
The answer is radio waves not gamma rays
100% since male offspring have the y chromosome from father
Mucous membrane, membrane lining body cavities and canals that lead to the outside, chiefly the respiratory, digestive, and urogenital tracts. Mucous membranes line many tracts and structures of the body, including the mouth, nose, eyelids, trachea (windpipe) and lungs, stomach and intestines, and the ureters, urethra, and urinary bladder.