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Give two reasons why an organism might gain a fitness benefit from helping their conspecifics.

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, some ...
GP
Answered by George P. • Zoology tutor
1129 Views

There are 700 students in a high school. 10% of them play team sports. 36 students play football, and 22 students play both football and basketball. When choosing one student from the school, what is the probability of them playing basketball only?

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 diagr...
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Answered by Dorottya T. • Maths tutor
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Explain the role of auxins in the control of phototropism

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 IAA...
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Answered by Florence T. • Biology tutor
6615 Views

Calculate the binomial expansion of (2x+6)^5 up to x^3 where x is decreasing.

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 expanding out 2^5. Now ...
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Answered by Sophie C. • Maths tutor
4353 Views

Find a solution for the following simultaneous equations: 2x+y=5 and 2x-5y=2

Subtract the 2nd equation from the first: 2x--2x+y+6y=5-2 <=> 7y=3 <=> y=3/7Input the value of y into one of the equations: 2x+3/7=5 <=> 2x=(35-3)/7 <=> x=16/7
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Answered by Darshil C. • Maths tutor
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