Why is the nucleus considered the command center of the celi

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

The model illustrates a process by which a substance is taken up by a cell

Which zone within the open-ocean zone is home to the most organisms? deep zone surface zone intertidal zone transition zone