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Explain the process of phagocytosis

Phagocytosis is a non-specific cellular defence mechanism by the body which is initiated when a pathogen invades the body and has antigens which are detected as antigenic or foreign – note that antigens are ...
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Answered by Sam R. • Biology tutor
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Write an ionic equation, with state symbols, to show the reaction of calcium with an excess of water.

Ca(s)+ 2H2O(l) ---> Ca2+(aq) + 2OH– (aq) + H2(g)
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Answered by Owais M. • Chemistry tutor
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What are the techniques used by the writer to arise the interest of the reader in terms of expression and discourse structure?

This question requires students to select examples of language use from a section of the text and comment on the effect the language use has on the reader. To answer this question one might need to think of ...
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Which chemical would have a higher boiling point 1,3-dimethylbutane or hexane

Hexane would have the higher boiling point, due to the fact it's unbranched unlike 1,3-dimethlybutane, hexane would have more surface contact and hence more London forces acting upon it. As a result it would...
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Answered by Talvin R. • Chemistry tutor
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Describe how to separate hydrocarbons of different lengths

Heat the oil up until it is a vapour Pass into fractionating column Negative temperature gradientHydrocarbons of different lengths have different boiling points They condense at different heights and are col...
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Answered by Mia N. • Chemistry tutor
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