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What is meant by the term polygenic inheritance? [2 marks]

This term refers to the idea that a single characteristic is encoded for my multiple genes at different loci . This gives rise to continuous variation.
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Answered by Odette F. • Biology tutor
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Explain how a vaccination prevents infection [3 marks]

The main way in which vaccinations prevent infection is by causing white blood cells to produce antibodies . These antibodies are produced rapidly upon re-infection and kill the pathogens.
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Answered by Odette F. • Biology tutor
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用括号中的词语“只要……就……”重写下面的句子，并保持句子原意:"凡是自己想做又能够做的都是休闲。"

只要自己想做又能够做的就是休闲。 (This is a question from A level Chinese Test Paper 2 - Reading and Writing)
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Answered by Mingfang S. • Mandarin tutor
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What is diffusion? (GSCE: OCR, Edexcel, AQA)

Definition : diffusion is the spreading out of particles from an area of high concentration to an area of low concentration The theory: Diffusion, is the scientific description for the gradual movement of pa...
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Answered by Ned F. • Biology tutor
14148 Views

How would you solve a quadratic equation by factorising?

Solve the equation : x 2 - 8x + 15 The first step is to factorise the quadratic equation. 1. You must find two numbers which will add to give -8 and multiply to give 15. The numbers that would do this are -5...
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Answered by Angelin G. • Maths tutor
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