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What are stable ecosystems? Can you give an example?

A stable ecosystem is where the outputs (losses of the ecosystem) equal the inputs (gains) - there is a balance. They are supported by what they produce, and their structure and function remain constant for ...
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Answered by Samhitha A. • Biology tutor
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Starch is made from two alpha-glucose polymers, amylose and amylopectin. Which is quicker to break down and why?

Amylose is formed from 1-4 glycosidic bonds, creating a compact spiral structure. It is unbranched, therefore enzymes can only work from either end to break the bonds and release glucose monomers - broken do...
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Answered by Samhitha A. • Biology tutor
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How do the actions of steroid hormones cause proteins to be made?

Steroid hormones move across the cell membrane to enter the cell (they can move through easily as they are made of lipid and are therefore non-polar, and also are generally quite small). They bind to recepto...
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Answered by Samhitha A. • Biology tutor
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What is a myocardial infarction and how is it treated?

A myocardial infarction is a fancy term for a heart attack, which is a common life threatening condition. Just splitting the name up tells us whats happening beneath the surface. Myo means muscle, Cardial re...
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Answered by Haroon A. • Biology tutor
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Comment on the Helen episode in Book 2 of Virgil's Aeneid (ll.568-600)

In this passage Aeneas, having just witnessed the murder of Priam, in a frenzy contemplates the murder of Helen, only to be prevented by the intervention of his mother Venus. Helen hiding "at the altar&...
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