Klinglers iron agar medium is used to find the enterobacteria which can ferment glucose , lactose and hydrogen Sulphide . They are H₂S producing bacteria .
This media have phenol red as an indicator. When the glucose is fermented to acid , the production of acid turn the indicator from red to yellow, but it is then reoxidised and turns red again . When lactose is fermented it produce large amount of acid , and turn indicator yellow . Hence the slant will become yellow.And combination of ferrous sulphate and sodium thiosulphate helps in detection of H₂S which produce black color at the butt .
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Answer:Explanation: Viruses are acellular organisms and although they do not have cells, they are extremely dependent on these structures, since they do not have their own metabolism and do not have any organelles. Viruses can only reproduce within a host cell other than fungi and bacteria
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Answer:
D.Both systems control movement
Explanation:
Skeletal protect the organs and hold up the body to move and the muscular system is for controlling movement.
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Answer:
A comet is an icy, small Solar System body that, when passing close to the Sun, warms and begins to release gases, a process called outgassing. This produces a visible atmosphere or coma, and sometimes also a tail.
Explanation:
 a celestial object consisting of a nucleus of ice and dust and, when near the sun, a ‘tail’ of gas and dust particles pointing away from the sun.
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