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What is Lamarck's theory?

Lamarck's theory suggests that changes that are obtained during a lifetime can be passed on to the offspring of that creature. The changes typically favour survival for the animal. For example, if a giraffe'...
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Answered by Sarah C. Biology tutor
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How is crude oil separated into fractions?

The crude oil is placed into large tanks, which are heated at the bottom, creating a gradient whereby the column is cooler at the top. The heat causes the oil to evaporate, and each fraction will reach a dif...
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Answered by Sarah C. Chemistry tutor
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Describe the structure and bonding of benzene.

Benzene consists of a ring of 6 carbon molecules. Each of these carbon molecules are bonded to each other by single bonds. This leaves free electrons in p-orbitals. The p-orbitals overlap, creating pi-bonds ...
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Answered by Sarah C. Chemistry tutor
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What is a topic sentence and why should I use them?

A good structure is crucial for a good essay because it allows the reader to follow your line of argument and because it prevents any confusion. One of the key elements of a good paragraph, therefore, is a t...
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Answered by Helena L. English tutor
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Solve 3(x-2) = 21

To begin, understanding the basica concept of algebra and multiplication using brackets needs to be covered as I have met quite a few children who have been used to these equations but are still unsure about...
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Answered by Nicole F. Maths tutor
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