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Rainbow [258]
3 years ago
14

Which of the following represents a physical change in matter?

Biology
1 answer:
jeyben [28]3 years ago
8 0
I think the answer is C hope this helps 
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What kind of change occurs when ice becomes liquid water?
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physical change

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it changes the form of the substance

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The bacterium responsible for gastric ulcers, Helicobacter pylori, survives the acidic pH of the stomach surprisingly well. It d
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H. pylori uses the enzyme urease to breakdown urea into ammonia (NH3) & carbon dioxide (CO2), where NH3 can act as a buffer to the acidic solution in the stomach.

Explanation:

<em>H. pylori</em> is a bacteria that has the enzyme urease to breakdown urea into ammonia (NH3) & carbon dioxide (CO2). The compound of interest here would be ammonia, or NH3. NH3 is a base, although relatively weak to other stronger bases, which means it has a pH above 7. In the stomach, the pH is acidic, or below 7. By synthesizing ammonia, <em>H. pylori </em>is able to buffer the stomach solution in a manner so that it isn't entirely acidic, but more toward the basic side, thereby allowing for its survival.

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3 years ago
Why do vaccines work for some diseases but not others?
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Answer:

The antibodies produced by a vaccine only fight specific antigens.

Explanation:

Antibodies only bind to specific antigen during an immune reaction. The introduction of foreign substance in the body stimulate the B-cells to produce antibodies that fight against infections. Only specific antibodies are produced following antigen presenting cells that bind to antigens. They capture and display the antigens to the antibodies.

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Provide thorough details of how human population, interplanar, and extraplanar conditions contribute to global climate change.
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Answer:

all i know is the one for the human population part shown in explanation by

ryuvrajsingh1298 ....

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Population growth is also important because it affects the Earth's ability to withstand climate change and absorb emissions, such as through deforestation as land is converted for agricultural use to feed a growing human population. We are currently adding more than 80 million people a year to our global population.

<em>I am sorry if this doesn't help.....</em>

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