A line on a map connecting points of equal salinity.

A feature that prevents interbreeding between different species, maintaining species boundaries.

An essential amino acid important for protein synthesis and metabolic regulation.

Compounds with the same molecular formula but different structures or spatial arrangements.

A type of growth where body parts grow at the same rate, maintaining proportions.

A volatile hydrocarbon that forms the building block of many natural compounds like rubber and terpenes.

The equilibrium between Earth’s crust and mantle such that the crust ‘floats’ at an elevation dependent on its thickness and density.

The vertical movement of the Earth’s crust to maintain isostatic balance.

A line on a map connecting points having the same temperature at a given time or average over a given period.

Having the same osmotic pressure; in biology, refers to solutions with equal solute concentration.