Search

Displaying 151 - 175 of 2021 items.

Amphioxus, and the Mosaic Theory of Development (1893), by Edmund Beecher Wilson

Edmund Beecher Wilson experimented with Amphioxus (Branchiostoma) embryos in 1892 to identify what caused their cells to differentiate into new types of cells during the process of development. Wilson shook apart the cells at early stages of embryonic development, and he observed the development of the isolated cells. He observed that in the normal development of Amphioxus, all three main types of symmetry, or cleavage patterns observed in embryos, could be found. Wilson proposed a hypothesis that reformed the Mosaic Theory associated with Wilhelm Roux in Germany.

Format: Articles

Subject: Experiments

Stazione Zoologica Anton Dohrn, Naples, Italy

The Stazione Zoologica Anton Dohrn (Anton Dohrn Zoological Station) is a public research institute focusing on biology and biodiversity. Hereafter called the Station, it was founded in Naples, Italy, in 1872 by Anton Dohrn. The type of research conducted at the Station has varied since it was created, though initial research focused on embryology. At the turn of the twentieth century, researchers at the Station established the sea urchin (Echinoidea) as a model organism for embryological research.

Format: Articles

Subject: Organizations, People, Places

John Tyler Bonner (1920- )

The establishment and growth of developmental-evolutionary biology owes a great debt to the work of John Tyler Bonner. Bonner's studies of cellular slime molds have shed light on some of the big questions of biology including the origins of multicellularity and the nature of morphogenesis. The second child of Lilly Marguerite Stehli and Paul Bonner, John Tyler was born 12 May 1920 in New York City and spent his early years in Locust Valley, Long Island (late 1920s), France (1930), and London (1932).

Format: Articles

Subject: People

Carol Widney Greider (1961-)

Carol Widney Greider studied telomeres and telomerase in the US at the turn of the twenty-first century. She worked primarily at the University of California, Berkeley in Berkeley, California.
She received the Nobel Prize in Physiology or Medicine in 2009, along with Elizabeth Blackburn and Jack Szostak, for their research on telomeres and telomerase. Telomeres are repetitive sequences of

Subject: People

B. Unger

image/jpg black and white image reformatted digital

Format: Photographs

L. Sribyatta

image/jpg black and white image reformatted digital

Format: Photographs

Mohamed Hasson Radi

image/jpg black and white image reformatted digital

Format: Photographs

Ernst Fischer

image/jpg black and white image reformatted digital

Format: Photographs

Kathleen M. Robertson

image/jpg black and white image reformatted digital

Format: Photographs

Mary Gojdics

image/jpg black and white image reformatted digital

Format: Photographs

S. M. Griswold

image/jpg black and white image reformatted digital

Format: Photographs

Lawrence Irving

image/jpg black and white image reformatted digital

Format: Photographs

C. Ladd Prosser

image/jpg black and white image reformatted digital

Format: Photographs

Conway Zirkle

image/jpg black and white image reformatted digital

Format: Photographs

H. Keffer Hartline

image/jpg black and white image reformatted digital

Format: Photographs

Leon Augustus Hausman

image/jpg black and white image reformatted digital

Format: Photographs

T.Y. Chen

image/jpg black and white image reformatted digital

Format: Photographs

Vintila Ciocaltau

image/jpg black and white image reformatted digital

Format: Photographs

Shiro Esaki

image/jpg black and white image reformatted digital

Format: Photographs

M. J. Sirks

image/jpg black and white image reformatted digital

Format: Photographs

Hans Spemann

image/jpg black and white image reformatted digital

Format: Photographs

Richard A. Fennell

image/jpg black and white image reformatted digital

Format: Photographs

Bernice L. Maclean

image/jpg black and white image reformatted digital

Format: Photographs

Katherine P. Hummel

image/jpg black and white image reformatted digital

Format: Photographs

Kurt G. Stern

image/jpg black and white image reformatted digital

Format: Photographs