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Explain how the HPV vaccine produces long-term immunity in individuals.

A vaccination is where tiny particles are introduced into the body to stimulate the immune system to defend itself against a micro-organism. Human Papilloma Virus (HPV) antigens are included in the HPV vacci...
TR
4984 Views

When do you use the subjunctive (mood)?

There are many instances for using the subjunctive. For example, it is used when expressing doubt, when someone recommends you do something/tells you to do something and there are also certain phrases which ...
ST
Answered by Seren T. • Spanish tutor
2314 Views

What is partisan dealignement?

Partisan dealignement is a term used to describe a pattern of voting behaviour. It suggests that less voters are strongly attached to a political party. As the electorate (voters) lose their emotional loyalt...
LJ
2899 Views

How do I make my essay less narrative?

This is a very common question for those studying history, even I sometimes find myself asking the same question when approaching essays at university. Its natural to fall into a narrative style, as we often...
BS
Answered by Bronagh S. • History tutor
8092 Views

What is the threshold frequency of a photon to excite and then emit photoelectrons from a material?

Use the photoelectric effect equation which shows conservation of energy between photons, electrons and the material that the electron is being freed from, hf = phi + KE max . Defining terms: h is Planck's c...
CS
Answered by Charles S. • Physics tutor
8071 Views