The expulsion of semen from the urethra is known as:

Proteins that specifically seek and bind to antigens on the surface of the pathogens are called:

A) Pathogens B) Antibodies C) Complements D) Antigens

The decimal equivalent to the fraction 1/8 is equal to

A) 0.125 B) 0.18 C) 0.25 D) 0.75