Answer:
Homologous
Explanation:
If two or more species share a unique physical feature, such as a complex bone structure or a body plan, they may all have inherited this feature from a common ancestor. Physical features shared due to evolutionary history (a common ancestor) are said to be homologous.
The pigments phycoerythrin and<span> </span><span>phycocyanin</span>
I believe that would be an open system.
the following is not a nucleotide is RNA
