Answer:
option c. Urea
Explanation:
Composition of normal urine is mostly water salts and other chemicals like uric acid, etc. about 95% of water is present in urine
Urea is one of the component produced in the metabolical activities of amino acid as the waste product of nitrogenous substances substance that is produced by amino acid metabolism.
Significant band high amount of urea in urine is an indicates that the kidneys are not functioning well or are an indication of Kidney failures and implies impairment in glomerular filtration.
Answer: A buffer is a chemical substance that helps maintain a relatively constant pH in a solution, even in the face of addition of acids or bases. Buffering is important in living systems as a means of maintaining a fairly constant internal environment, also known as homeostasis. Because all biological processes are dependent on pH, cells and organisms must maintain a specific and constant pH in order to keep their enzymes in the optimum state of protonation. This system provides the maximum buffering capacity near pH 6.86 (the pKa of H2PO4- ). Several substances serve as buffers in the body, including cell and plasma proteins, hemoglobin, phosphates, bicarbonate ions, and carbonic acid. The bicarbonate buffer is the primary buffering system of the IF surrounding the cells in tissues throughout the body.
Explanation:
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Answer:
The virus needs a host.
Explanation:
Viruses are tinier than bacteria. In fact, the largest virus is smaller than the smallest bacterium. All viruses have is a protein coat and a core of genetic material, either RNA or DNA. Unlike bacteria, viruses can't survive without a host. They can only reproduce by attaching themselves to cells. In most cases, they reprogram the cells to make new viruses until the cells burst and die. In other cases, they turn normal cells into malignant or cancerous cells.
Also unlike bacteria, most viruses do cause disease, and they're quite specific about the cells they attack. For example, certain viruses attack cells in the liver, respiratory system, or blood. In some cases, viruses target bacteria.
Hope that helps!
M
The correct answer would be d