The analogy is telling because it introduces often overlooked critical aspects of convergent extension: for example, what are the cells sensing for? People forming a queue may 'cut in' between two ...

This is a dramatic example of convergent evolution, when organisms that aren't closely related evolve similar traits as they both adapt to similar environments. There are a finite number of ...

An example of a linear sequence. A list of numbers or diagrams that are in a particular order is called a sequence close sequenceA sequence is a set of numbers that follow a certain rule.

The 𝒏th term refers to a term's position in the sequence, for example, the first term has 𝒏 = 1, the second term has 𝒏 = 2 and so on. An expression for the 𝒏th term is worked out by ...