Soil Student activity Play

Sources of enzymes Slideshow Play

Souring of milk Animation Play

Specificity of enzymes Student activity Play

Stages of chocolate production Slideshow Play

Stages of conjugation in bacteria Whiteboard exercise Play

Structural polysaccharides Student activity Play

Structural polysaccharides Whiteboard exercise Play

Structure and function of an autoclave Animation Play

Structure and function of the bacterial cell Slideshow Play

Structure and functions of the large intestine Slideshow Play

Substances essential for the growth of plants Student activity Play

Substances essential for the growth of plants Whiteboard exercise Play

Sulphur bacteria Illustration Play

Sweets destroy our teeth Animation Play

Symbiosis Class activity Play

Syphilis – delicate but deadly Student activity Play

Syphilis – the course of the disease Slideshow Play

The actions of antibiotics and their significance in medicine Student activity Play

The blue-green bacteria Slideshow Play

The causes and control of plant diseases Slideshow Play

The differences between prokaryotes and eukaryotes Slideshow Play

The earliest known living organisms Slideshow Play

The earliest known living organisms Student activity Play

The effect of fertilisers on water basins or reservoirs Student activity Play