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What is the role of white blood cells in the immune system?

White blood cells can have different roles and are important for protecting the body against pathogens. They can ingest a pathogen and destroy it, some produce antitoxins...

Answered by Anna W. • Biology tutor

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Describe the structure of silicon dioxide

A giant macromolecular covalent structure with a high melting point and covalent intramolecular bonds between all atoms.

Answered by Rohan K. • Chemistry tutor

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Integrate 2x^3 -4x +5

2x³- 4x + 5For integration we add 1 to the power, and divide by the new powerso: (2x³⁺¹ )/4 - (4x¹⁺¹)/2 +5x⁰⁺¹=1/2 x⁴- 2x²+ 5x

Answered by Anne Elizabeth G. • Maths tutor

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solve the 1st order differential equation 2y+(x*dy/dx)=x^3

1st we note our three methods for solving 1st order differential equation: separating the x and y variables to both sides of the equation, and integrating both sides with respect to x. Recognising an exac...

Answered by Douglas H. • Further Mathematics tutor

2724 Views

Discuss the use of the extended metaphor in Tony Harrison’s poem ‘Book Ends’.

In the poem Book Ends by Tony Harrison, the speaker’s mother has just died and he is sitting with his father as they try to decide which words should appear on her gravestone. Harrison uses the c...

Answered by Grace B. • English Literature tutor

12727 Views