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Germ Layer

Johann Gregor Mendel (1822–1884)

Johann Gregor Mendel studied patterns of trait inheritance in plants during the nineteenth century.

Roger Sperry’s Split Brain Experiments (1959–1968) - Image

Rh Incompatibility in Pregnancy - Image

Rh factor is a protein found on the outside of Rh-positive red blood cells.

Virginia Apgar (1909–1974) - Image

During the mid-twentieth century, Virginia Apgar worked as an obstetrical anesthesiologist and gave drugs to women that reduced their pain during c

Human Papillomavirus (HPV) Strains 6 and 11 and Strains 16 and 18

Human Papillomavirus, or HPV, is a viral pathogen that most commonly spreads through sexual contact.

The First Successful Cloning of a Gaur (2000), by Advanced Cell Technology - Image

The first successful cloning of a gaur in 2000 by Advanced Cell Technology involved the cells of two animals: an egg cell from a domestic cow and a

Estrogen

The figure depicts three different molecular structures of estrogen found in mammals’ that differ by the arrangement of bonds and side groups.

Southern Gastric Brooding Frog-Image

The Southern Gastric Brooding Frog (Rheobotrahcus silus) was a frog species that lived in Australia. It was declared extinct in 2002.

Jelly Fish and Green Fluorescent Protein

The crystal jellyfish, Aequorea victoria, produces and emits light, called bioluminescence.