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What is a sequential hermaphrodite and why is it important to be aware of sequential hermaphrodites in relation to over-fishing?

A Sequential Hermaphrodite is when an organism (often fish) is born as one sex, but later in life changes sex. Eg Clownfish are born male but the largest becomes female. This is important in fish populat...

Answered by • Environmental Studies tutor

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Evaluate the idea that British Standard English is superior to other varieties of English used around the world.

In every language, there is an observable both linguistic and social distinction between the standard, non-regional variety, which is generally seen as more prestigious by its speakers, and its dialectal ...

Answered by • English Language tutor

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Describe the shape of, and bonding in, a molecule of benzene and explain why benzene does not readily undergo addition reactions.

Benzene is a planar, cyclical, hexagonal molecule, with the molecular formula C₆H₆. It consists of a ring of 6 carbon atoms with alternating single bonds and double bonds. The length...

Answered by • Chemistry tutor

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Solve the simultaneous equations x – 2y = 1 and x^2 + y^2 = 29.

Start by modifying the first equation and making a third x=2y+1x²= (2y+1)² x²=4y²+4y+1therefore, if we sub this 3rd equation into the 2nd equation we get :4y

Answered by Adamya P. • Maths tutor

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Explain how blood glucose levels are controlled and how this is an example of negative feedback mechanisms.

The pancreas detects rises in blood glucose levelsThis triggers pancreatic beta cells to secrete insulin, and inhibits alpha cells from secreting glucagonInsulin stimulates the uptake of glucose into cell...

Answered by Hannah L. • Biology tutor

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