Describing class intervals Student activity Play

Describing class intervals – alto singers Whiteboard exercise Play

Describing class intervals – speed of light Whiteboard exercise Play

Description of oscillations Student activity Play

Detecting sickle cell disease by means of a genetic probe Student activity Play

Detecting sickle cell disease by means of a genetic probe Slideshow Play

Detection of linked genes Slideshow Play

Differences in inheritance of traits Student activity Play

Different modes of speciation Whiteboard presentation Play

Different modes of speciation Class activity Play

Diffraction of sound waves Student activity Play

Diffraction of sound waves Animation Play

Diffraction of sound waves Whiteboard exercise Play

Diffraction of sound waves Animation Play

Diploidy; chromosomes; genes and alleles Student activity Play

Dominant and recessive traits Student activity Play

Dominant and recessive traits Slideshow Play

Doppler effect Class activity Play

Doppler effect Whiteboard presentation Play

Doppler effect for different waves Whiteboard exercise Play

Doppler effect for different waves Student activity Play

Dot plot Student activity Play

Effect of concentration – a microscopic view Student activity Play

Effects of mutations in reproductive cells Animation Play

Einstein's formula Animation Play