A gland that secretes hormones directly into the blood. They have no ducts.
Back
Card 7
Front
The removal of metabolic waste from the body.
Back
Card 8
Front
Waste substances that may be toxic or are produces in excess by the reactions inside cells.
Back
Card 9
Front
Organisms that ingest and digest complex organic molecules releasing the potential energy stored in them.
Back
Card 10
Front
Organisms that use light energy or chemical energy and inorganic molecules (carbon dioxide and water) to synthesise complex organic molecules.
Back
Card 11
Front
Molecules that absorb light energy. Each absorbs a range of wavelengths in the visable region and has it's own distict peak of absorbtion. Other wavelengths are reflected.