Semen is a mixture of sperm and seminal fluid, a liquid that consists of the secretions of the seminiferous tubules, seminal vesicles, prostate, and bulbourethral glands.
The seminal fluid (which is primarily composed of water, fructose, proteins, minerals, and other micronutrients) provides the sperm with a transportation medium, nutrients, and protection from the hostile acidic environment of the male’s urethra and the female’s vagina.
The answer is C. Raccoons they eat both plants and animals.
Answer: A negative feedback mechanism is a regulatory mechanism in which a stimulus causes an opposite output in order to maintain an ideal level of whatever is being regulated. Example: osmoregulation. A positive feedback mechanism is a process in which the end products of an action cause more of that action to occur in a feedback loop. Example: childbirth.
