I think the correct answer from the choices listed above is the first option. The density of a mineral is the ratio of a mineral's mass to its volume. Density<span> is a measure of the mass of a certain volume of the sample. Hope this answers the question.</span>
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Tuberculosis (TB) is a bacterial infection that affects mainly respiratory tract and can be transmitted from one to another person through contaminated air. The causative agent of tuberculosis, <em>Mycobacterium tuberculosis</em> has developed resistance against many antibiotics, such as rifampin and isoniazid, which is known as tuberculosis drug resistance.
If a person infected with TB shows drug resistance against some TB drugs, 'doctors should give other TB drugs to that person, even if these drugs show less effect than common drugs'. This is because these drugs can prevent or kill the bacterium more effectively than the common drugs for which, bacterium is resistance.
The original source of energy in a food chain is the sun.
