B. Krill
I hope this will help you that is the correct answer
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Answer:
There are 20 amino acids that make up all proteins in all living things, 12 of those we can make, that other 8 are said to be essential amino acids.
Explanation:
Essential amino acids are those amino acid which is not prepared in the body of living organisms. There are nine essential amino acids i. e. valine, phenylalanine, threonine, histidine, isoleucine, leucine, lysine, tryptophan and methionine. These amino acids are used for building of important substances such as enzymes etc that are necessary for normal growth of body.
Answer:
Evolution.
Explanation:
It might have acquired the ability to cause disease due to evolution. Due to evolution, the harmless bacteria can turn into infectious pathogens that cause diseases. Evolution is the change in the characteristics of a species over several generations due to the process of natural selection. This evolution in the bacteria occurs due to changing of environmental conditions which changes the genetic makeup of that harmless bacteria and turn into infectious pathogen.
