Atlantic Cod is a marine fish. The fish has less salt in its internal body while the salt concentration in the sea water in which the Cod lives is high. Thus through the process of osmosis ( a process in which an element moves across a permeable membrane from regions of high concentration to the regions of low concentration) the salt moves from the ocean into the fish body. In such scenario the metabolism of the fish body gets disturbed, and there is an urgent need to remove the excess salt with the help of Kidney (through extremely concentrated urine) by going against the concentration gradient in order to maintain the homeostasis.
It is mutualism because the human and the Lactobacilli need each other for their health. Mutualism is when two species benefit. That is what is happening in this scenario.
The answer is D. Proteins.
As enzymes are considered to be globular proteins, made up of amino acids linked together in one or more polypeptide chain, to which this as a whole is a protein.
I feel like 5 is one of the answers
