They're a plant's anchor & can have a fibrous or tap system
This calcified tissue that surrounds the pulp cavity of a tooth is a bone-like substance
Around 1940 scientists found that mutations in these chromosomal units result in defective enzymes
4-letter word for the force that hinders an airplane's forward thrust, caused by friction with the air
Named for the third Greek letter, they resemble X rays but have shorter wavelengths
The MR in MRI, it's the absorption of energy by atoms
A battery may have a single one of these electricity producing units or have several connected in series
The simplest of the aldehyde compounds, it prevents deterioration of protein-rich substances
Pre-Y1K scientists figured this organ gave out light; they were, of course, wrong
In biology it's a finger; in math, a figure like 1