yes.
no.
they are preventable
Yes, people change answers on WikiAnswers all of the time. It is to better the quality of the answer. So, yes, it is completely true.
Yes. For your information, the site that you are posting this question IS WikiAnswers. Sometimes, it is true that WikiAnswers' answers are not true. However, most of the answers are true. Sometimes, there are vandals who make turn true answers to false answers, but it is false to say that WikiAnswers is not true. To find out whether WikiAnswers' answers are true, sign up now to become a true WikiAnswers Contributor! Be true to yourself if you get addicted!
It is true that nearly all of the energy that earth receives from the sun is used in photosynthesis.
Nearly all of the energy that earth receives from the sun is used in photosynthesis is true.
Nearly all of the energy that earth receives from the sun is used in photosynthesis is true.
No, it is true.
yes.
I have made many contributions to Wikianswers, in fact I am nearly a silver contributor.
They lacked experience in living independently.
They lacked experience in living independently