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Describe the process of allopatric speciation. How does this differ from sympatric speciation?

Basic level answer Description of some form of geographical separation leading to isolated populations Referencing reduced interbreeding and the development of differences between populations Identify that s...
JK
Answered by James K. • Biology tutor
4754 Views

Define cash flow and explains ways in which a business can improve its cash flow.

Cash flow is the the movement of money coming in and out of a business on a day-to-day basis. It can be improved through selling assets, cutting costs, reducing current assets and increasing current liabilit...
LG
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Essay Question: How did women artists expand Surrealism? Discuss with reference to at least two women artists, and works of art in any medium.

Introduction: Begin with an introductory paragraph, in which you problematise the question and give context. For example, in this case, you could: - Begin by explaining the Surrealist male's approach to wome...
IH
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How do you factorise a quadratic with a co-efficient in front of the x^2 - e.g: 3x^2 + 14x + 8

Ok so to factorise a quadratic with a co-efficient in front of the x^2 you need to follow a couple of steps: Step 1 - multiple the co-efficient by the number at the end of the expression - e.g. 3^8 = 24 Step...
NK
Answered by Nathaniel K. • Maths tutor
3957 Views

Show, using the focus-directrix property for an ellipse, that PS +PS'=2a where P is a point on the ellipse and S and S' are the two foci.

The focus diretrix property for an ellipse is PS/PD=e. Now this is also the case for the other directrix and focus, so PS'/PD'=e. Now we can rearrange these equations to find a formula for PS +PS', PS +PS'=e...
DL
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