romario

This page lists questions and answers that were posted by visitors named romario.

Questions

The following questions were asked by visitors named romario.

A scientist wishes to determine how effective a vaccine is in protecting rats against a contagious disease. Which experimental procedure should the scientist use to determine the vaccines effectiveness?
16 years ago

Answers

The following answers were posted by visitors named romario.

a summary of theme for english b
15 years ago