The correct answer is the neurotoxin known as tetanospasmin toxin.
Explanation:
Tetanus is a disease caused by a bacteria known as clostridium. The bacteria are found in soil, manure, dust, and saliva. It can enter the host body by a cut or rusted or dusty nail or burn. It causes muscle spasm or jaw locking or bone locking.
It releases the neurotoxin that is tetanospasmin toxin that inhibits the secretion of γ-aminobutyric acid (GABA) and results in a variety of symptoms associated with tetanus.
Thus, the correct answer is the neurotoxin known as tetanospasmin toxin.
Out of the choices given, the way this this provides evidence for evolution is since the genetic code is the same across species, these species must have inherited it from a common ancestor. This will make the correct answer D. <span />
