IMMUNOLOGY

Detailed explanation-1: -bacillus, (genus Bacillus), any of a genus of rod-shaped, gram-positive, aerobic or (under some conditions) anaerobic bacteria widely found in soil and water. The term bacillus has been applied in a general sense to all cylindrical or rodlike bacteria.

Detailed explanation-2: -Rod-like bacteria maintain their cylindrical shapes with remarkable precision during growth. However, they are also capable to adapt their shapes to external forces and constraints, for example by growing into narrow or curved confinements.

Detailed explanation-3: -Bacillus species are rod-shaped, endospore-forming aerobic or facultatively anaerobic, Gram-positive bacteria; in some species cultures may turn Gram-negative with age. The many species of the genus exhibit a wide range of physiologic abilities that allow them to live in every natural environment.

Detailed explanation-4: -A bacillus ( PL bacilli), also called a bacilliform bacterium or often just a rod (when the context makes the sense clear), is a rod-shaped bacterium or archaeon. Bacilli are found in many different taxonomic groups of bacteria.

Detailed explanation-5: -Bacillus thuringiensis, by the name ‘bacillus’, suggests that these are rod-shaped bacteria as bacillus is the term used for rod-shaped bacteria. So, the correct option is ‘Rod-shaped’.

Detailed explanation-6: -Another benefit of a rod-like shape is the inherent breaking of symmetry, allowing the cell to concentrate molecules at specific cellular locales. Despite their small size, bacteria are capable of concentrating proteins at different locations in the cell.

Detailed explanation-7: -Bacilli are rod-shaped microorganisms. The plural of the word, Bacilli, is the name of the group of bacteria to which this genus belongs. The term is also frequently used to describe the form (rod) of some bacteria.