If there's options, I assume mutation?
Because bacteria mutates that's why we have a new flu vaccine every year , because strains of DNA in the bacteria change all the time.
Answer: Homologous structures
Explanation: They are structures which have similarities in various organisms but carry out opposite functions. This is the opposite of analogous structures
Pretty sure it’s Trace fossil hope that helps
Answer:
A critical function of proteins is their activity as enzymes, which are needed to catalyze almost all biological reactions.
