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Explain the mechanism of meiosis.

Meiosis is a specific type of cell division. Unlike mitosis, which results in 2 identical copies of the mother cell, meiosis creates 4 daughter cells each containing half of a normal gentic material (we refe...
MG
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Calculate the PH of 32 mmol of HCl in 75cm^3 solution. Assume HCl fully dissociates.

32 mmol = 0.032 mol 75cm 3 = 0.075dm 3 n = c x v so c = n / v c = 0.032mol/0.075 dm 3 = 0.426moldm -3 pH = -log[H+] pH = -log(0.426) = 0.37 (no units)
AP
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How is the heart beat controlled?

Cardiac muscle is myogenic i.e has the ability to contract naturally, without external stimuli, such as action potentials arriving via nerves. For the whole heart to contract in an organised manner, there ne...
CB
Answered by Cezar B. Biology tutor
3166 Views

To what extent does the impact of the First World War explain the outbreak of 2 revolutions in Russia in 1917?

The First World War displayed the ineffectiveness and under preparation of the Russian army as by 1917 there were c.4 million Russian soldiers dead and c.3 million wounded; this caused resentment towards a T...
EP
Answered by Ellie P. History tutor
5948 Views

Derive the following with respect to x1: y=(x1*x2)/(x1+x2).

y is a function of x 1 and x 2 . We are asked to derive y with respect to x 1 , meaning that x 2 remains constant. Note that y ' is the derivative of y. Both the numerator and denominator of the fraction con...
TK
Answered by Thaleia K. Maths tutor
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