A seals flippers has finger bones when a birds wing is just a bone connected to other joints.
Answer:
involve calcium voltage-gated channels
Explanation:
He observed 15 different finch species that originated as one ancestral bird. all differing in body shape, beak size, and mating habbits
It's biohazard. Also if it's flammable the symbol will show a flame and if it's corrosive it'll show a image with a hand being dissolved or like a spot missing by a liquid being dropped from a tube