Examlex
The scores of identical twins reared apart are more highly correlated than the scores of fraternal twins reared together.
Covalent Bond
A chemical bond formed by the sharing of one or more pairs of electrons between atoms, contributing to the molecule's stability.
Hydrogen Bond
A slight bond between two molecules due to the electrostatic draw between a proton in one and an electronegative atom in the opposite molecule.
Atoms
The basic unit of a chemical element, consisting of a nucleus of protons and neutrons, and electrons orbiting the nucleus.
Proteobacteria
Largest bacterial lineage; members show a wide range of metabolic diversity.
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