Which internal organille was visible in the potatoe slice

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

What would be an example of hypothesis for goldfish respiration lab

Adigestive system that is a series of tubes beginning at the mouth and ending at the anus is a digestive system.