Insect egg cell Illustration Play

Interaction of amine and polypeptide hormones and cell receptors Animation Play

Interaction of steroid hormones and cell receptors Animation Play

Internal fertilization Animation Play

Invention of the voltaic cell Animation Play

Isolation of DNA from other cell structures Animation Play

Junction between an antigen and a helper T cell Whiteboard exercise Play

Large nematode – another big problem Student activity Play

Larval stages Whiteboard exercise Play

Larval stages Student activity Play

Larval stages in invertebrate development Slideshow Play

Leucocytes – always ready to fight Student activity Play

Levels of cell organization in the organism Slideshow Play

Life cycle of mosses Animation Play

Life processes in plants Student activity Play

Light microscopy – magnifying the object Student activity Play

Light microscopy – magnifying the object Whiteboard exercise Play

Lipids – the energy source of the cell Whiteboard exercise Play

Lipids – the energy source of the cell Student activity Play

Macroelements Student activity Play

Macroelements in the cell Slideshow Play

Major sources of energy Slideshow Play

Male gonads Whiteboard exercise Play

Male gonads Student activity Play

Measure of electromotive force Simulation Play