Question

3. Explain the different types of shapes found in bacteria with the help of diagrams.​

Answer 1

Answer:

The three basic bacterial shapes are coccus (spherical), bacillus (rod-shaped), and spiral (twisted), however pleomorphic bacteria can assume several shapes. Cocci (or coccus for a single cell) are round cells, sometimes slightly flattened when they are adjacent to one another

Explanation:

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Answer 2

Answer:

coli , a bacillus of about average size is 1.1 to 1.5 µm wide by 2.0 to 6.0 µm long.

Spirochaetes occasionally reach 500 µm in length and the cyanobacterium

Oscillatoria is about 7 µm in diameter.

The bacterium, Epulosiscium fishelsoni , can be seen with the naked eye (600 µm long by 80 µm in diameter).

One group of bacteria, called the Mycoplasmas, have individuals with size much smaller than these dimensions. They measure about 0.25 µ and are the smallest cells known so far. They were formerly known as pleuropneumonia-like organisms (PPLO).

Mycoplasma gallicepticum, with a size of approximately 200 to 300 nm are thought to be the world smallest bacteria.

Thiomargarita namibiensis is world’s largest bacteria, a gram-negative Proteobacterium found in the ocean sediments off the coast of Namibia. Usually it is 0.1—0.3 mm (100—300 µm) across, but bigger cells have been observed up to 0.75 mm (750 µm).

Explanation:

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