What is the relationship among chromosomes, gene's and dna

Which of the following would most likely be key to gathering evidence that the rna world hypothesis is valid? creation of suitable environments for long-term study of single-celled organisms simulation of early earth conditions and long-term study of the resulting molecules development of a system for studying the microsphere's ability to absorb additional molecules categorization of the different specific conditions that result in the development of microspheres

In which specialized organ of the plant would these cells most likely be found

Surrounded by microtubules, located near the nucleus. (don't try to google it) (give answer only if u know)