Answer: There will be change in the tube in which E.coli will be incubated and there will be no change in the test tube in which Shigella is incubated
Explanation:
Lactose Fermentation Test is done to see which bacteria ferments lactose. pH and color indicator is attached to observe the change. The pH goes slightly down because of formation of Acid and due to this reason a color change is also seen during this test.
As E.coli typically ferments lactose so there will change in color and pH in the test tube incubated with E.coli, while there will be no change in the test tube incubated with Shigella.
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Answer:</h2>
Removal of the tarnish from the silver is a <u>physical change</u>.
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Explanation:</h2>
The type of change which doesn't produce any new substance is called as physical change. Tarnish refers to the thin black layer that is formed on the silver. Formation of tarnish is chemical change as due to oxidation a black color layer is formed.
On the other hand, removal of tarnish from silver is considered as physical change as no new product is formed and only we are obtaining the silver in its pure form.
Answer:
B because they are mutated and they are dividing faster than group A
Explanation:
Answer:
The given blank can be filled with acid.
Explanation:
Acid deposition or acid rain refers to a broad term that comprises any kind of precipitation with acidic constituents like nitric acid or sulfuric acid, which falls to the ground from the atmosphere in dry or wet condition. This can fall in the form of snow, rain, hail, fog, or even dust, which is acidic. When sulfur dioxide reacts with water vapors, they give rise to sulfuric acid, and identically when nitrous oxide reacts with water vapors it produces nitric acids, which transforms the water of rain into acidic form.