Bacteria and fungi play an important role in ecosystems because they are decomposers. Decomposers are animals, bacteria, or other plants, (etc..) that consume dead organisms and return fertile soil as a result. The dead organisms they recycle also help them contribute more natural resources like carbon and nitrogen. These resources are released back into the soil, air, and water. Hope this helps! :D
Mitochondrion, It's the power house of the cell.
<span>Histamine might be released for the blood vessels. This will cause them to constrict and stop the inflammation. When an allergen is taken in by the body, this causes the system to release the histamine as a way of helping those blood vessels dilate and lower a person's blood pressure.</span>
The correct answer is option (B) lemon juice.
pH refers to the logarithmic scale used to indicate the acidity or basicity of an aqueous solution. It is the negative of the base 10 logarithm of the activity of the hydrogen ion. Solutions with a pH less that 7 are considered acidic and the solutions with a pH greater that 7 are considered to be basic. A pH of 7 is neither an acid nor a base and is considered neutral.
An acid has a high concentration of hydrogen ions (H+) and a base has a low concentration of hydrogen ions. Higher the hydrogen ion concentration, pH is acidic. Among the given substances, lemon juice has a pH of 2, urine has a pH of 6, tomato juice has a pH of 4 and black coffee has a pH of 5. Since lemon juice has a pH of 2, it has the lowest –OH ion concentration.
