SCIENCE
VIRUS AND BACTERIA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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bacillus
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coccus
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spirillum
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None of the above
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Detailed explanation-1: -The correct option is B. Bacilli. Bacteria are microscopic single-celled organisms. The bacteria are usually of four types: Cocci (spherical bacteria), Bacilli (rod-shaped bacteria), Spirilla (spiral or twisted bacteria), Vibrio(comma-shaped).
Detailed explanation-2: -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-3: -Bacteria are classified according to their shape, or morphology. Spherical bacteria are known as cocci, rod-shaped bacteria are bacilli, and spiral-shaped bacteria are spirilla.
Detailed explanation-4: -Bacillus bacteria is a rod-shaped bacteria.
Detailed explanation-5: -A rod shaped cell has a streamlined body which would be advantageous in swimming, just like the slender body of a fish, a boat or a plane. A spherical body will experience greater frictional resistance. This hypothesis is supported by the fact that among the flagellated motile bacteria almost all are rod shaped.