I don’t know dear keep trying
A Polypeptide chain is a sequence of amino acids that is the foundation for the basic structure of a protein
Answer:
500-million-year-old fossil found in BC is ancient ancestor of spiders and scorpions. Palaeontologists in British Columbia have found a fossil of the oldest known ancestor of scorpions and spiders.
Correct one should be
<span>osmosis.</span>
