Which of these is true about spores produced by bacteria?

Question

BlackTom AI · Accepted Answer

Question restatement: The prompt asks which statement about spores produced by bacteria is true.
Option a: 'Spores are very difficult to kill' — This is the key correct idea in microbiology. Bacterial endospores are highly resistant to heat, desiccation, chemicals, and radiation due to protective layers, low metabolic activity, and other factors, making them notoriously hard to eradicate.
Option b: 'Spores need food to survive' — This is misleading. Spores are dormant forms; they do not require nutrients to maintain viability during dormancy. They only germinate and resume growth when favorable conditions, including nutrients, are encountered.
Option c: 'Spores need water to survive' — While living vegetative cells require water, spores are adapted to survive desiccation and can remain viable in dry environments for long periods. Water is not a prerequisite for their survival in dormancy.
Option d: 'Spores are activated by the thawing process' — Activation and germination of spores are typically triggered by favorable conditions, which can include heat or nutrient signals, but the statement about activation specifically by thawing is not a standard or accurate generalization and can be misleading. Activation mechanisms are more nuanced and not defined simply as thawing.
In summary, the strongest, well-supported true statement is that spores are very difficult to kill, reflecting their notable resistance properties; the other options misrepresent aspects of spore biology or oversimplify the germination/activation processes.

Which of these is true about spores produced by bacteria?单项选择题

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