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How is the sperm cell adapted to its role?

The role of the sperm cell is to fertilise the egg.- It has a streamlined shape with a tail which enables it to swim towards the egg.- It has a head with a nucleus, which contains the genetic material.- It h...
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Answered by Iona S. • Biology tutor
14583 Views

Find the turning point of the curve whose equation is y = (x-3)^2 + 6.

The turning point can be found by using the concept of transformations. Firstly, it is important to form a relation between the values of a and b in an equation of the following form y = (x+a)^2 + b and the ...
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Answered by Sai V. • Maths tutor
5094 Views

What is stratified sampling?

A sampling method where subgroups (strata) of the target population are identified and participants are subsequently sampled from these subgroups in proportion to their occurence in the target population.
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Answered by Lauren W. • Psychology tutor
2850 Views

When do you use the "Imparfait" as opposed to the "Passé-Composé" in French?

Both the imperfect and perfect tense evoke actions in the past, however they are used differently.The imperfect is used to describe something or someone, to talk about a habit (an action that was done over a...
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Answered by Claire L. • French tutor
2195 Views

What is the structure and features of a DNA molecule

A DNA molecule is shaped in a double helix. It is composed of two sugar-phosphate backbones, conjoined by what we call 'bases'. These nitrogen bases: adenine, guanine, cytosine and thymine, which form the 'c...
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Answered by Gaspard D. • Biology tutor
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