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How does a white blood cell ingest and kill a bacteria?

White blood cells can kill pathogens in multiple ways, one of these is called phagocytosis. During phagocytosis, a specific white blood cell called a phagocyte recognises the bacteria through a process calle...
BF
Answered by Beth F. • Biology tutor
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Find the x value of the stationary points of the graph y = x^2e^x

The problem here can be solved quite easily by thinking about the graph. A stationary point occurs on a graph when it becomes 'flat'. You can think of this visually as the top of a hill or the bottom of a di...
SM
Answered by Serkan M. • Maths tutor
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How should I practice for a GCSE French speaking exam?

There are three key stages to revising for a speaking exam. The first, highlighting the different topics up for discussion and what questions might come out of these. Using mind maps, researching the topics ...
BG
Answered by Billi G. • French tutor
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To desire something, or someone, brings with it pain and pleasure in equal measure. Discuss the significance of desire in two texts you have studied.

Despite the 38 years between publication, the two contrasting texts of the play ‘A streetcar named Desire’ and the dystopian novel, ‘The Handmaids Tale’ both explore the theme of the juxtaposing emotions tha...
AE
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The Curve C has equation y = 3x^4 - 8x^3 -3. Find the first and second derivative w.r.t x and verify that y has a stationary point when x = 2. Determine the nature of this stationary point, giving a reason for your answer.

The first derivative is otherwise denoted by dy/dx.dy/dx = 12x^3 -24x^2.The second derivative is denoted by d 2 y/dx 2 , otherwise known as the first derivative of the function dy/dx.d 2 y/dx 2 = 36x^2 - 48x...
JB
Answered by Jemisha B. • Maths tutor
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