Question

briefly explain four type of bacteria on their basis of their shape​

Answer 1

Explanation:

Bacteria are classified into five groups according to their basic shapes: spherical (cocci), rod (bacilli), spiral (spirilla), comma (vibrios) or corkscrew (spirochaetes). They can exist as single cells, in pairs, chains or clusters.

Answer 2

Shape of Bacterial Cell

The three basic bacterial shapes are coccus (spherical), bacillus (rod-shaped), and spiral (twisted), however pleomorphic bacteria can assume several shapes.

1 Cocci (or coccus for a single cell) are round cells, sometimes slightly flattened when they are adjacent to one another.

2 Bacilli (or bacillus for a single cell) are rod-shaped bacteria.

3 Spirilla (or spirillum for a single cell) are curved bacteria which can range from a gently curved shape to a corkscrew-like spiral. Many spirilla are rigid and capable of movement. A special group of spirilla known as spirochetes are long, slender, and flexible.

4 Tetrads: The cocci are arranged in packets of four cells, as the cells divide in two plains.

Examples: Aerococcus, Pediococcus and Tetragenococcus.

5 Sarcinae: The cocci are arranged in a cuboidal manner, as the cells are formed by regular cell divisions in three planes. Cocci that divide in three planes and remain in groups cube like groups of eight.

Examples: Sarcina ventriculi, Sarcina ureae, etc.

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