Horse used for plowing or other heavy labor.

simple sugar which is important energy source in living organisms.

ester formed from glycerol and three fatty acid groups. .

act or process bringing change. Exchanges of one set of clothes for another. To replace something with another thing.

system or means of conveying people or goods from place. To carry things from one place to another.

Becoming unstable. person who is believed to respond to paranormal influences.

substance produced by living organism which acts as catalyst to bring about specific biochemical reaction. Substance in living things helping chemical change.

any of class of nitrogenous organic compounds. Groups of molecules made from amino acids.

Made of various elements. distinct compound or substance.

(of mechanism) activated by trigger. To start a process off e.g. a memory.

engaging in speech. action of talking. To say things or ideas to someone with words.

Used before you explain something simply, clearly.

To move someone to a higher position or rank.

Used to add new (often different) information.

action or process of releasing or being released. To let go of something you are holding.