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To analyse a text you haven't seen before, begin by carefully reading it through in order to get a sense for what kind of text it is and the main topic(s) it is about. Look for any clues that you are give...

Kin selection / Inclusive fitness - if the helper and receiver are related, then they share some of their genes. By helping a relative, you are increasing the likelihood of them passing on their genes, so...

We know that 10% play team sports, that means 700*0.1=70 students play team sports. Out of those 70, 36 students play football, 22 play both sports, that means 36-22=14 play football only. Let's draw a di...

A phototropism is the growth of a plant in response to light. This is mediated by auxins such as IAA (Indoleacetic acid). This is released in the tips and shoots of flowering plants. In response to light ...

In order to use the binomial expansion, we must have an 'x' with no coefficients - so no number before it.
So we take out a factor of 2:(2(x+3))^5
We can then simplify to:32(x+3)^5
by expa...