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Pathogens are disease-causing organisms which can infect humans. Bacteria and viruses are two examples of pathogens. Explain the differences between bacteria and pathogens and give an example of each.

Bacteria:Contain naked DNA Have a cell wall, membrane and organelles - RibosomesAre cells Larger than virusesCan survive without living hostCan be treated with antibiotics example: Staphylococcus aureus Viru...
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Answered by Tabitha G. • Biology tutor
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13/2 - 5/3 = ?

Change both the denominators to 6...Times 13/2 by 3 to get 39/6Times 5/3 by 2 to get 10/6 Then its 39/6 - 10/6 and then look at the numerator and work out 39-10 = 29The answer is therefore 29/6
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Answered by Patsy B. • Maths tutor
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Why is scarlet fever, caused by Streptococcus bacteria, more common in children than adults?

Adults are exposed to the toxin as a child, which initiates an immune response. B lymphocytes are produced and release antibodies which bind to the specific toxin and destroy it as part of the humoural immun...
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Answered by Amelia D. • Biology tutor
3413 Views

What's the difference between 'avoir' and 'être' verbs?

When conjugating a verb (i.e. when we work out that the verb avoir is in these forms: j'ai, tu as, il/elle/on a, nous avons, vous avez, ils ont, that is the same thing as conjugating the verb) in the perfect...
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Answered by Georgia W. • French tutor
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"dux Gallorum timebat ne Romani viros collem ascendentes audirent." How would I go about translating this sentence?

1) Read the whole sentence first so that you can get a sense of what to expect e.g. 2 verbs (timebat and audirent), 1 present participle (ascendentes), a fearing clause anticipating a subjunctive (timebat ne...
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Answered by Seran A. • Latin tutor
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