Question

Which morphology would be beneficial for bacterial cells that live in dry and salty environments (like...

Which morphology would be beneficial for bacterial cells that live in dry and salty environments (like your skin)?

A. spirochete

B. bacilli

C. cocci

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Answer #1

The spherical shape or cocci Bacteria evolve or survive more among all possible shapes.A sphere has the minimum surface area per unit volume. A large surface area might be good for intake of nutrients like bacilli but it may prove detrimental under some other conditions such as desiccation or osmotic shocks.If a cell is exposed to desiccation or to a hypertonic environment, it will lose water through its surface . Bacteria have mechanism to resist desiccation.In environment where osmotic shock or desiccation is likely to be faced more frequently a spherical shape or cocci have more chances to grow and survive.Thats why our answer is 'C' cocci

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