What is a ten letter word for.. trees that show how organisms are related

nevermind!!! a 12 letter word for it...sorry

i also need structures that have no use...a 9 letter word

The word you are looking for is "phylogeny." To arrive at this answer, here's a breakdown:

1. Start with the question: "What is a ten-letter word for trees that show how organisms are related?"
2. Identify key information: The word should be ten letters long and relate to trees that demonstrate the relationships between organisms.
3. Think about the concept: The trees that illustrate the relationships between organisms are called "phylogenetic trees" or "phylogenic trees."
4. Count the letters: Confirm that the word "phylogeny" has ten letters.
5. Answer the question: "A ten-letter word for trees that show how organisms are related is 'phylogeny.'"

So, the 10-letter word for trees that show how organisms are related is "phylogeny."