THE STEEP DESCENT OF THE SEABED FROM THE CONTINENTAL SHELF TO THE ABYSSAL ZONE

THE FLORA AND FAUNA FOUND ON THE BOTTOM, OR IN THE BOTTOM SEDIMENTS, OF A SEA, LAKE, OR OTHER BODIES OF WATER

The flora and fauna found on the bottom, or in the bottom sediments, of a sea, lake, or other body of water

(of a bad, difficult, or unwelcome situation or phenomenon) Present or experienced to a severe or intense degree. (of a disease or its symptoms) Of short duration but typically severe.

A chemical compound that neutralizes or effervesces with acids and turns litmus blue; typically, a caustic or corrosive substance of

A substance capable of causing cancer in living tissue

The chemical processes that occur within a living organism in order to maintain life

A long and distinct period of history with a particular feature or characteristic

A short, microscopic, hairlike vibrating structure

the act of making immune