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Explain how red blood cells are adapted to carry out their function efficiently.

The main function of red blood cells is to transport oxygen from the lungs to tissues all across the body and to remove the waste gas product carbon dioxide from the body tissues out through the lungs.It ...

FC
Answered by Faye C. Biology tutor
2755 Views

How and why are sperm cells specialised ?

Sperm cells are specialised because they have a specific function in the body- to fertilise the female gamete (egg). Therefore to carry out its job, it has special features typical body cells do not. The ...

AS
Answered by Antonia S. Biology tutor
33655 Views

Factorise 5x^2 + 20x

Factorising is a way of simplifying an equation by putting it into common parts. In the equation above we can see that x is common to both the 5x^2 and the 20x. If we divide by x and put this in-front of ...

DC
Answered by Dominic C. Maths tutor
5639 Views

Find where the equation y = x^2 + x - 2 crosses the x-axis.

First, notice that any equation crosses the x-axis when y = 0.Second, notice that x2 + x - 2 = 0 is an example of a quadratic equation. So, we generally do 1 of 3 things (Factorise, Complete th...

AR
Answered by Asad R. Maths tutor
2927 Views

When is the subjunctive used?

The subjunctive is always preceded by que/ qui and almost always in a dependent clause. However, these two factors can be present without the subjunctive being required, so how do we know? The fi...

Answered by French tutor
2347 Views

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