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What are the differences between directional and stabilising selection? Give an example of each.

In directional (a.k.a. adaptive) selection, one extreme of a population has a selective advantage i.e. is fitter than other individuals of the population. This causes a directional shift towards this extr...

Answered by Ben S. • Biology tutor

4204 Views

A drone is hovering at a constant height above the ground. The mass of the drone is 7 kg. The mass of the package is 3 kg. Calculate the upward force of the Drone.

To answer this Question we will use the equation derived from Newtons second law of motion,
F=ma or in this case W=mg as it is the mass of the object being accelerated by gracity, giving us it's wei...

Answered by Finn T. • Physics tutor

3655 Views

How do I analyse a source for a source question or essay.

Analysing a source is the key skill needed for the study of history. An excellent method for doing this is the CABLE method.
C - Content: What is the source actually saying? This requires close readi...

Answered by Finn T. • History tutor

1366 Views