Final answer:
The bacteria bacilli have a rod-shaped form. They are one of the commonly found shapes of bacteria which also include cocci (spherical), spirillum (spiral), and vibrio (comma-shaped). Bacilli can vary greatly in size and shape but are primarily characterized by their rod-like structure.
Step-by-step explanation:
The kind of shape the bacteria bacilli have is rod-shaped. Bacteria are often described by their characteristic shapes. The common bacterial shapes include coccus (spherical), bacillus (rod-shaped), spirillum (spiral), and vibrio (comma-shaped). Specifically, bacilli refer to rod-like bacteria, and they display a great diversity at the cellular level, including different sizes and lengths of the rod-shaped structure.
Bacteria can be identified and classified by their shape. The basic shapes are: cocci (spheres), bacilli (rods), and spirilli (spirals), and they have cellular features like cytoplasm, ribosomes, and a plasma membrane, which are also found in eukaryotic cells.