The correct answer would be
B. Fiber
Fiber is the indigestible portion of food from plants.
Answer:
I believe it is A, but I could be wrong.
Explanation:
I think this, because when it says, "Other, less useful, versions of the genetic code were eliminated gradually throughout the course of evolution", I think it referencing to the fact that all animals and etc, are made up of common codes, and how over time, through evolution, certain codes were eliminated, because creatures were evolving.
Answer: tympanic membrane
Homeostasis is essential because it maintains internal stability
