Biology is the study of matter. 

Each element has a unique number of neutrons. 

A hydrogen bond is a weak bond that holds atoms slightly together. 

Physicians are currently able to correct spina bifida at around the seventh or eighth month of pregnancy using

monosaccharides are classified based on 

DNA is short for _______________ acid.

the sign (positive or negative) of a correlation coefficient is based on whether

When designing an experiment, the purpose of random assignment is to ensure that: 

Who is credited with establishing the first laboratory and conducting research in the field of psychology in Leipzig, Germany in 1879?

A group of researchers investigated the effects of two vocabulary learning strategies on word retention two weeks after. In this example, learning strategy is the              variable, and word retention is the                variable.