Which of the following is the best title for the passage?

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     The term 'virus is derived from the Latin word for poison. or slime. It was originally applied to the noxious stench emanating from swamps that was thought to cause a variety of diseases in the centuries before microbes were discovered and specifically linked to illness. But it was not until almost the end of the nineteenth century that a true virus was proven to be the cause of a disease. 

          The nature of viruses made them impossible to detect for many years even after bacteria had been discovered and studied. Not only are viruses too small to be seen with a light microscope, they also cannot be detected through their biological activity, except as it occurs in conjunction with other organisms. In fact, viruses show no traces of biological activity by themselves. Unlike bacteria, they are not living agents in the strictest sense Viruses are very simple pieces of organic material composed only of nucleic acid, either DNA or RNA, enclosed in a coat of protein made up of simple structural units (Some viruses also contain carbohydrates and lipids.) They are parasites, requiring human, animal, or plant cells to live. The virus replicates by attaching to a cell and injecting its nucleic acid.' once inside the cell, the DNA or RNA that contains the virus' genetic information takes over the cell's biological machinery, and the cell begins to manufacture viral proteins rather than its own

The author implies that bacteria were investigated earlier than virus cause because ________.

Read the following passage and mark the letter A, B, C or D on you answer sheet to indicate the correct answer to each of the questions. 

     The term 'virus is derived from the Latin word for poison. or slime. It was originally applied to the noxious stench emanating from swamps that was thought to cause a variety of diseases in the centuries before microbes were discovered and specifically linked to illness. But it was not until almost the end of the nineteenth century that a true virus was proven to be the cause of a disease. 

          The nature of viruses made them impossible to detect for many years even after bacteria had been discovered and studied. Not only are viruses too small to be seen with a light microscope, they also cannot be detected through their biological activity, except as it occurs in conjunction with other organisms. In fact, viruses show no traces of biological activity by themselves. Unlike bacteria, they are not living agents in the strictest sense Viruses are very simple pieces of organic material composed only of nucleic acid, either DNA or RNA, enclosed in a coat of protein made up of simple structural units (Some viruses also contain carbohydrates and lipids.) They are parasites, requiring human, animal, or plant cells to live. The virus replicates by attaching to a cell and injecting its nucleic acid.' once inside the cell, the DNA or RNA that contains the virus' genetic information takes over the cell's biological machinery, and the cell begins to manufacture viral proteins rather than its own

All of the following may be components of a virus EXCEPT

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Physics are one of the core subjects in natural sciences.

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     One of the most wondrous and iconic animals to walk the Earth, Bengal tigers, (25) _________ are majestic and rare. They're also one of the biggest cat species in the world. On average, Bengals are larger than (26) _______ tiger species, but the largest tiger ever (27) _______ was a Siberian. As such, Bengals are considered the second largest tiger species. 

          Today, wild Bengal tigers are animals that only live in Bangladesh, Bhutan, India, and Nepal. (28) _________ there are more Bengals than any other tiger subspecies on the Indian subcontinent, the populations are endangered. Conservation efforts are working to some degree, but they're not (29) __________ the poaching, deforestation, and human encroachment that has devastated wild tiger habitats over the past 50 years

Read the following passage and mark the letter A, B, C or D on your answer sheet to choose the word or phrase that best fits each other numbered blanks. 

     One of the most wondrous and iconic animals to walk the Earth, Bengal tigers, (25) _________ are majestic and rare. They're also one of the biggest cat species in the world. On average, Bengals are larger than (26) _______ tiger species, but the largest tiger ever (27) _______ was a Siberian. As such, Bengals are considered the second largest tiger species. 

          Today, wild Bengal tigers are animals that only live in Bangladesh, Bhutan, India, and Nepal. (28) _________ there are more Bengals than any other tiger subspecies on the Indian subcontinent, the populations are endangered. Conservation efforts are working to some degree, but they're not (29) __________ the poaching, deforestation, and human encroachment that has devastated wild tiger habitats over the past 50 years

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When the parents have died, the nuns will take ___________ the children.

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The media have produced live covering of Michael Jackson's fans around the world mourning for him

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The Browns got disappointed after watching a/an _________ basketball match

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No matter _______ confident you are, it's almost impossible not to be a little nervous before an important exam.

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Finally, Tom's team lost in the competition because he is a weak and ________ leader

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No one in our club can speak English as fluently as Mal

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It is probable to rain heavily this evening

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