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Explain the role of auxins in the control of phototropism

A phototropism is the growth of a plant in response to light. This is mediated by auxins such as IAA (Indoleacetic acid). This is released in the tips and shoots of flowering plants. In response to light IAA...
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Answered by Florence T. • Biology tutor
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Calculate the binomial expansion of (2x+6)^5 up to x^3 where x is decreasing.

In order to use the binomial expansion, we must have an 'x' with no coefficients - so no number before it. So we take out a factor of 2:(2(x+3))^5 We can then simplify to:32(x+3)^5 by expanding out 2^5. Now ...
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Answered by Sophie C. • Maths tutor
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“A chip off the old block.” By considering Shakespeare’s dramatic presentation of Cordelia in King Lear, evaluate this view.

Cordelia is irrevocably loyal to her father, whereas Lear is quick to dismiss Cordelia as his daughter and banish her to France. For example, Cordelia’s response to the love test: “I shall never marry like m...
SM
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How would I structure an introduction to the essay question: 'To What Extent Was German Aggression the Most Important Cause of the First World War?'

The aim of the introduction is to indicate the direction your essay will take and demonstrate to the examiner that you are going to meet the criteria of the mark scheme. An immediate overview of the First Wo...
JC
Answered by Jacob C. • History tutor
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What is differentiation

Differentiation is a mathematical operation which we can use to study how one quantity, such as the distance travelled by a train, is affected by another quantity, such as time. For example, if the train is ...
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Answered by Oliver B. • Maths tutor
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