SharpkopLife Sciences P1 · Scientific investigation and graphs
3.3.12 marks
A researcher studied how the hormone thyroxine affects the resting heart rate of rats. She placed 12 rats in each of two groups. Group P received daily injections of thyroxine for two weeks. Group Q was given daily injections of a salt solution with no thyroxine. All other conditions were the same for both groups. State the purpose of Group Q in this investigation.
NSCBased on Nov 2024 · Paper 1 · Q3.3.1
Not yet checked by a teacher. Spot a problem? Report it.