[Solved] What is the cellular structure of most rhizarians? A) Single celled, shelled B) Multicellular, shelled C) Unicellular, naked D) Colonial, naked E) Colonial, shelled Diethyl Ether: An organic compound, commonly used as a solvent, with the formula \(C_2H_5OC_2H_5\). Cyclic Ethers: Organic compounds that contain an ether group (-O-) within a ring structure. Grignard Reagent: Grignard reagent is a type of organomagnesium compound used in organic synthesis, typically represented as RMgX, where R is an organic group and X is a halogen. Cyclopentene Oxide: A cyclic ether with a three-membered epoxide ring adjacent to a cyclopentene structure.