Adaptations of insects that are essential for life on land Illustration Play

Amino acids Slideshow Play

Amino acids – the basic units of proteins Student activity Play

Biological treatment of wastewater Slideshow Play

Biological treatment of wastewater Student activity Play

Chemical elements essential for plants Slideshow Play

Energy as an essential factor in muscle contraction Student activity Play

Enzymes are essential to life Slideshow Play

Essential and non essential elements Slideshow Play

Essential and non-essential amino acids Whiteboard exercise Play

Essential and non-essential amino acids Student activity Play

Essential elements Whiteboard exercise Play

Essential elements – macro-elements; trace elements and ultra-trace elements Student activity Play

Essential fatty acids Animation Play

Essential minerals Student activity Play

Essential minerals Whiteboard exercise Play

Glandular tissue Student activity Play

Mutualism – associations essential for survival Whiteboard exercise Play

Mutualism – associations essential for survival Student activity Play

Plant growth Student activity Play

Plant growth Class activity Play

Protocooperation – associations not essential for survival Student activity Play

Protocooperation – associations not essential for survival Whiteboard exercise Play

Quantities of essential elements in 1000 g of dry plant mass Illustration Play

Statements about plant requirements Whiteboard exercise Play