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How does a river profile alter with distance downstream?

A rivers long profile typically varies in accordance with the upper, middle and lower course. The upper course typically has a steeper profile, a v shaped bottom, is narrower with faster flowing water. Water...
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Answered by Theo S. • Geography tutor
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How does the polymerase chain reaction (PCR) work?

PCR is a method to isolate and amplify a specific fragment of DNA that you would like to study. The reaction is set up with template DNA, primers, DNA polymerase enzyme and free nucleotides. Primers are shor...
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Answered by Sunya A. • Biology tutor
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How is the structure of the lung adapted for respiratory function?

The lung can be divided into different sections regarding its function. The tube that connects the airway to the lungs is called the trachea, which is made of cartilage rings. These are flexible, and allow s...
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Answered by Rebecca I. • Biology tutor
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What is the doctrine of the Trinity?

The doctrine of the Trinity is the Christian understanding of God, which has been developed over the centuries. It was first explored in the early days of the Church by theologians such as Augustine and Greg...
MR
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Name the lobes of the cerebrum and describe their function briefly. Also describe the function of the cerebellum and the brainstem.

There are 8 lobes in the cerebrum, 4 in each hemisphere. The frontal lobes are involved in conscious thought, planning, emotions, and problem solving. The parietal lobes are responsible for processing of sen...
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