Differences in size Student activity Play

Dot plot Animation Play

Dot plot Student activity Play

Egg cell Illustration Play

Electroreception in a ray Animation Play

Embryo and fetus development Animation Play

Embryo development – from zygote to blastocyst Animation Play

Embryo sac development and egg cell formation Whiteboard exercise Play

Embryo sac development and egg cell formation Student activity Play

Enterobiasis Slideshow Play

Environmental variation Student activity Play

Environmental variation - twins Illustration Play

External and internal fertilization Slideshow Play

External fertilization in newts and salamanders Animation Play

Facts about the puberty in females Whiteboard exercise Play

Famine Whiteboard exercise Play

Fertilization Student activity Play

Fertilization and development Student activity Play

Fertilization and the first weeks of the embryo's life Student activity Play

Fertilization and the first weeks of the embryo's life Whiteboard exercise Play

Fertilized insect egg cell Illustration Play

Fish – jawless; cartilaginous and bony Student activity Play

Formation of the embryo sac and pollen grain Slideshow Play

Frequency table Student activity Play

Frequency table – number of eggs Animation Play