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Why is the heart known as a double pump?

The heart is known as a double pump becasue each half pumps blood around a different circulation system. The right side pumps blood to the lungs, while the left side pumps blood around the body.
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Answered by David H. • Biology tutor
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What is meant by the semi-conservative replication of DNA?

Semi-conservative replication means that during DNA replication, the two strands of nucleotides separate. Both strands then form the template for free nucleotides to bind to to create the two identical daugh...
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Answered by David H. • Biology tutor
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(Paper 4) English as a Global Language: What are 'Kachru's Three Circles of English'?

Braj Kachru was a Professor of Linguistics who coined the term 'World English'. 'World English' refers to the fact that the English language has been used as a global means of communication in numerous diale...
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(Paper 4) Language Acquisition: What are the different functions of 'young people's' language?

Instrumental function - language that is used to fulfil a need , such as to obtain food, drink or comfort. Regulatory function - language that asks, commands and requests . Interactional function - language ...
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How can I make the difference between the 'passé simple' and the 'imparfait'

The 'passé simple' is a tense for a past, finished action whereas, the 'imparfait' is used to describe an action in the past, longer and maybe unfinished. Passé simple is a precise moment whereas Imparfait i...
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Answered by Florence B. • French tutor
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