Answer: A substance is matter which has a specific composition and specific properties. Every pure element is a substance. Every pure compound is a substance. Examples of substances: Iron is an element and hence is also a substance.
Explanation:
A class of lipids used as chemical messengers, to signal cells to undergo changes, is called Monoglycerides. Its a class of glycerides which are composed of molecules of glycerol linked to fatty acid by easter bond.
Monoglycerides are the type of glyceride and that made up of glycerol and one fatty acid chain. Triglycerides are very similar expect they have three fatty acid chains. Mono and diglycerides may be manufactured through the reaction of plant or animal derived fatty acids with glycerol which breakdown plant or animals which derived fats and oils.
Lipids such as steroid hormones that serve as chemical messengers between cells , tissues and organs and other communicate signals between biochemical system within a single cell.
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The answer to this question is option B for sure.
Dysentery is caused as a result of bacterial infection caused by an unusual strain of E.coli. The E.coli is found normally in the intestine but during infection watery diarrhea along with mucous and blood is there.
Dysentery can also be caused by other infectious pathogens such as bacteria, parasites or viruses. The infection is caused when the pathogen enters the large intestine via mouth due to consumption of contaminated water or food, oral contact with the objects which are contaminated.
The treatment to the infection is through antibiotic drug.
