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Explain Darwin’s theory of evolution by natural selection.

In an animal population most organisms produce more offspring than can survive to adulthood. For this reason, there is competition with each other for resources, such as food, shelter and mates, in order ...

SP
2590 Views

Explain why damaged villi may result in poor growth (4 marks)

(mark 1) damaged villi reduce the surface area for villi (mark 2) meaning fewer amino acids and glucose are absorbed (mark 3) less glucose present means there is less energy transferred in respiration (ma...

JA
Answered by Jemima A. Biology tutor
3018 Views

How significant was Winston Churchill In the war against Nazi Germany?

AJP Taylor described Churchill as “the saviour of his country”.  Churchill's leadership for many including Taylor was the ultimate factor which lead to Britain’s ultimate victory in total war. However, h...

AC
Answered by Aiden C. History tutor
2194 Views

What type of compound is CH3COOH? Circle the correct answer. A) Alkene B) Carboxylic acid C) Alcohol D) Ketone

The correct answe gere is B) Carboxylic acidCH3COOH( ethanoic acid, or also cale acetic acid) is a carboxylic acid. This could be justified by the presence of -COOH(carboxylic functional group) in the str...

SM
Answered by Stefan M. Chemistry tutor
11056 Views

a right-angled triangle has base 2x + 1, height h and hypotenuse 3x. show that h^2 = 5x^2 - 4x - 1

initially, explain Pythagorean's Theory --> a^2 + b^2 = c^2.explain c is the hypotenuse, a and b can be either base or height.using a as base and b as height, a = 2x+1. b = h. c = 3xsubstitute into for...

MA
Answered by Mohammad A. Maths tutor
3240 Views

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