Top answers

How do white blood cells defend against invading pathogens?

They can engulf and ingest pathogens; this is essentially the white blood 'eats' the pathogen. They secrete (release) antitoxins which counteract the toxins released by pathogens. The toxins they release are...
EM
Answered by Emily M. • Biology tutor
15397 Views

How do I choose which short answer questions to answer in the exam (AQA)?

In a nutshell: choose the questions in which you feel you will get the most marks. The difficulty arises when the 40 mark essay question you want to answer is the same topic as one of the short answer questi...
AF
Answered by Alana F. • Geography tutor
6486 Views

How to quickly and effectively analyse a poem?

Although obvious, the first thing you must do is read the poem! After reading two or three times, try an ascertain the premise of the poem: who/what is it about? If this proves difficult, try and determine t...
AF
Answered by Alana F. • English tutor
4444 Views

Why does your hair stand on end when you touch a Van de Graaff generator?

This is all down to static electricity. Inside the Van de Graaff generator, there is a rubber band and rollers. As they are electrically insulated, when the motor turns they rub together and electrons are 'k...
TW
Answered by Tom W. • Physics tutor
84258 Views

What is the largest possible length of a pole you could fit in a room?

Lets say you are in a cubical grain silo, with a height of 12m, and a base with dimensions 3m by 4m. If you wanted to fit a pole in the silo, what is the largest possible length of the pole? The length we ar...
TW
Answered by Tom W. • Maths tutor
6660 Views