Answer:
ring
Explanation:
ri
The sphincter is a ring of muscle surrounding and serving to guard or close an opening or tube
Answer:
B
Explanation:
Both processes involve cell division as it can either be in meiosis (gamete formation) or mitosis (cell division into identical cells)
The answer is C) evidence of exoskeletons and endoskeletons
<span>Arthropods and Tetrapod </span> have an endoskeleton and exoskeleton. Endoskeleton is <span>a skeleton found within the interior of the body </span>while exoskeleton is the external skeleton that supports and protects an animal's body like the outer shell that protects them from predators.