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How does sexual selection lead to the evolution of elaborate male traits?

Observing animal species with exaggerated ornaments and weapons that do not seem of importance in the animal’s struggle for survival, Darwin created the concept of sexual selection to account for the evoluti...
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Answered by Zdravko Z. • Biology tutor
3771 Views

How do I begin to answer a question on a piece of 'unseen' poetry or prose?

Don't be daunted. Unseen questions are there to test your close-reading rather than memory skills. This can be scary but it is also reassuring as you have everything you need in front of you to answer the qu...
KB
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The curve C has equation 4x^2 – y^3 – 4xy + 2^y = 0 The point P with coordinates (–2, 4) lies on C . Find the exact value of dy/dx at the point P .

Since we need to find dy/dx, we must first differentiate the equation implicitly which gives us: 8x - 3y 2 dy/dx - 4y - 4xdy/dx + 2 y ln(2)dy/dx = 0. Because we are given a point, we can substitute in the x ...
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Answered by Samuel N. • Maths tutor
9405 Views

At what point(s) do lines y = x^2 - 5x - 14 and y = 3x + 2 intersect? Write your answer in surd form

To find the point(s) where these two lines intersect we will first find the x coordinate of the point(s) where they intersect snd use this to find the corresponding y coordinate by substituting the x value i...
KJ
Answered by Kieran J. • Maths tutor
4751 Views

How are epigenetics involved in regulating gene expression?

Epigenetic control of gene expression involves mechanisms that do not alter the sequence of DNA itself. External factors acting upon cells translate their signals via cascades to the nucleus, where they act ...
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Answered by Harry H. • Biology tutor
3357 Views