[Solved] Which of the following describes the structure of the coronavirus virion? A) Naked helical capsid B) Naked icosahedral capsid C) Icosahedral nucleocapsid surrounded by an envelope D) Helical nucleocapsid surrounded by an envelope E) None of the above. Independent Variables: Variables in an experiment that are manipulated by the researcher to observe their effect on the dependent variables. Conceptual Replications: Repeating a study with different methods or under different conditions to verify the findings of the original study. Conceptual Variables: Theoretical entities or constructs that represent ideas or concepts being studied but are not directly observable. Spatial Reasoning: The ability to understand and remember the spatial relations among objects, often tested through puzzles and visual-spatial tasks.