Answer:
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The answer is they produce endospores.
Explanation:
The endospores are dormant, non-reproductive, tough bacterial spores that ensure the survival of bacteria in adverse conditions.
During the environmental stress, such as starvation, desiccation, radiation and chemical treatment many bacteria form dormant endospores. These endospores germinate again when the conditions become favorable.
Hence, if drought conditions lead the stream to dry up, the bacteria that live there would produce endospores to survive.
<span>useful substances must be selectively reabsorbed
Filtration of blood by kidney only selected based on the molecule size. That means all small molecule will enter the kidney, doesn't matter whether it is toxic or useful.
But kidney has another mechanism such as reabsorption. In </span>reabsorption, some specific useful molecule(like glucose) will be absorbed back.
Answer:
Explanation:
Proteins are built from a set of only twenty amino acids, each of which has a unique side chain. The side chains of amino acids have different chemistries.