Final answer:
Paramecium is a unicellular organism with hairlike cilia, not multicellular. Different cell types have unique chemical requirements, and nerve cell extensions in the brain can extend over several hundred micrometers.
Step-by-step explanation:
Statement A: The Paramecium is a multicellular microorganism covered with hairlike cilia is false. Paramecium is a unicellular organism and not multicellular, although it is indeed covered with hairlike cilia used for locomotion and feeding.
Statement B: Cells of different types can have different chemical requirements is true. Each type of cell might require different nutrients, operate under varying conditions, and perform unique functions, leading to diverse chemical needs.
Statement C: The branchlike extensions that sprout from a single nerve cell in a mammalian brain can extend over several hundred micrometers is true. The dendrites and axons of neurons can indeed extend for several hundred micrometers and are vital for conducting electrical signals throughout the brain and the nervous system.