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What is the Endosymbiosis Theory?

Lynn Margulis proposed this theory in 1996. It explains how the eukaryotic cells engulfed through endophagocytosis some organelles such as mitochondria and chloroplasts, which evolved from bacteria. The cell...
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Answered by Ingrid G. Biology tutor
6106 Views

What means Mitochondrial Eve?

Every cell of our body has two different kind of DNA: nuclear and mitochondrial. The nuclear DNA is found in the nucleus of the cell, and is inherited from both parents. However, the mitochondrial DNA, which...
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What is a Verbal Periphrasis?

In Spanish we form a verbal periphrasis to express a single idea by using two verbs in the same sentence, in a similar way in English we use Phrasal verbs. Their usual structure is: Auxiliary verb + nexus (m...
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Answered by Ingrid G. Spanish tutor
24548 Views

What is 'Chain Rule' and why is it useful?

The chain rule is most commonly seen in Leibniz's notation, which is as follows:<o:p></o:p> dz/dx = dz/dy * dy/dx<o:p></o:p> You can remember it intuitively by thinking of the two 'dy...
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Answered by Tully K. Maths tutor
6296 Views

How do I find the maximum/minimum of a function?

The maximum/minimum of a function are the points where the first derivative (the gradient) of the function is zero. So with a function of the form y=f(x), you must take the derivative (dy/dx) and set your re...
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Answered by Ellie L. Maths tutor
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