Development of the embryo Simulation Play

Diet of the Red Deer Slideshow Play

Different foods – different adaptations Student activity Play

Different foods – different adaptations Simulation Play

Different types of chemical energy Slideshow Play

Differentiation rules (2) Class activity Play

Differentiation rules (2) Whiteboard presentation Play

Diffusion and smelling food Animation Play

Digestion Student activity Play

Digestion in the alimentary canal Illustration Play

Digestion of carbohydrates; proteins and lipids Student activity Play

Digestion of food rich in cellulose Whiteboard presentation Play

Digestion of food rich in cellulose Class activity Play

Digestion times for different foods Chart Play

Digestive strategies of herbivores Slideshow Play

Digestive strategies of herbivores Student activity Play

Dioxins Student activity Play

Earthworms and frogs Illustration Play

Ecological pyramids Student activity Play

Ecological pyramids Whiteboard exercise Play

Effect of light on the growth of food plants Slideshow Play

Effects of an excess of nutrients in the environment Slideshow Play

Energy expenditure and loss in heterotrophs Student activity Play

Energy flow and food chains Student activity Play

Energy flow through food chains Animation Play