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What is the role of succession and how does this maintain ecosystems?

Succession is the term given to describe the changes that take place within an ecosystem. Barren land such as bare rock can be formed by the eruption of a volcano or a glacier retreating. The first stage of ...
PV
Answered by Pankti V. • Biology tutor
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Why can there be one major product and one minor product after electrophilic addition takes place across a double bond?

This formation of a major product and minor product only occurs if the double bond is unsymmetrical (when the carbon atoms involved in the double bond are bonded to different groups), for example in butene. ...
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Answered by Craig F. • Chemistry tutor
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What is the best way to provide quotation evidence in my essays?

Within English Literature, most exam boards are looking for evidence that is thoughtful, relevant, and embedded within the sentence. Keeping this in mind, at A-level an ideal length for quotes used to back u...
SM
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The genetic code is the sequence of bases in DNA, which is found in chromosomes and is made up of double stranded polynucleotides. Explain what is meant by the term “double-stranded polynucleotide” in relation to DNA.

It is known as double-stranded as there are two strands of DNA joined by hydrogen bonds between the bases and polynucleotide refers to the fact that there are many nucleotides joined by phosphodiester bonds.
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Answered by Abishan T. • Biology tutor
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How do I write an essay under exam conditions, effectively planning my time?

The key to this begins with spending time reading the question carefully, making sure you understand what it is that is being asked of you. For example, if the question states ‘In light of this quotation’, m...
EL
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