What shape are spiraled or corkscrew-shaped bacterial cells?

The correct answer is spirilla, which refers to bacteria that have a twisted or spiral shape, resembling a corkscrew. These spiraled forms are characteristic of this type of bacteria, allowing them to move in a unique manner through their environments, which can be advantageous for survival. Spirilla are often found in water or moist environments and can play important roles in ecosystems, such as in the decomposition process.

The other choices represent different bacterial shapes: bacilli refer to rod-shaped bacteria, cocci are spherical in shape, and diplococci signify a type of cocci that occur in pairs. Understanding these distinctions is key to identifying and working with various bacterial forms in esthetics and microbiology, as they can have different implications for health and treatments used in the field.