Differentiating between ecosystems Slideshow Play

Diffraction Slideshow Play

Diffraction of waves and Huygens' principle Slideshow Play

Digestive strategies of herbivores Slideshow Play

Digital encoding of images Slideshow Play

Diploidy; chromosomes and genes Slideshow Play

Direct current meters Slideshow Play

Direct evidence for the structure of the inside of the Earth Slideshow Play

Disaccharides and polysaccharides Slideshow Play

Discontinuous variation Slideshow Play

Discovering meiosis Slideshow Play

Discovery of DNA Slideshow Play

Discrete variables Slideshow Play

Diseases Slideshow Play

Diseases caused by drinking alcohol Slideshow Play

Diseases of the liver and their diagnosis Slideshow Play

Disinfection properties of halogens Slideshow Play

Disorders related to abnormalities in the number of sex chromosomes Slideshow Play

Disorders related to the undersecretion and oversecretion of growth hormone Slideshow Play

Distribution of stomata in different types of plant Slideshow Play

Diversification of beaks in Darwin's finches Slideshow Play

Diversity of angiosperms Slideshow Play

Diversity of individual organisms and type of reproduction Slideshow Play

Division of viruses with respect to the type of nucleic acid Slideshow Play

DNA analysis in forensic medicine Slideshow Play

DNA; genes and the genome Slideshow Play

Dominant and recessive traits Slideshow Play

Dosimeters Slideshow Play

Drive and stimulus  Slideshow Play

Drugs affecting the nervous system Slideshow Play