In an experiment a scientist is testing to see if different sized jars affect the length of time a candle will burn. What is the independent variable of
this experiment?

A. size of jar

B. shape of jar

C. type of candle

D. length of time candle burns

Patricia is told by her physician that her body and brain chemistry have physically adapted to the drug and that she has become dependent on the tranquilizers prescribed for her by another doctor.

Which of the following is not a food produced in rainforests? a) coffee b) cocoa c) avocados d) wheat

Agene pool: a) is the collection of all the alleles found in a single species b) is the collection of all the alleles found in a single population c) is the collection of all the chromosomes found in a single population d) is the collection of genes in a species that allow the individuals to swim