AP BIOLOGY

Detailed explanation-1: -Schleiden studied cells as the common element among all plants and animals. Schleiden contributed to the field of embryology through his introduction of the Zeiss microscope lens and via his work with cells and cell theory as an organizing principle of biology. Schleiden was born in Hamburg, Germany, on 5 April 1804.

Detailed explanation-2: -What did Matthias Jacob Schleiden contribute to the cell theory? Matthias Jacob Schleiden studied microscopic plant structures. In his studies, he observed that the different parts of the plant organism are composed of cells or derivatives of cells.

Detailed explanation-3: -Matthias Schleiden was a famous botanist that studied plant cells. Schleiden’s research and experiments led him to formulate the foundation to the cell theory. Schleiden stated that plants grew from a single cell and that the cell is the most simple framework of plants.

Detailed explanation-4: -German scientists Theodore Schwann and Mattias Schleiden studied cells of animals and plants respectively. These scientists identified key differences between the two cell types and put forth the idea that cells were the fundamental units of both plants and animals.

Detailed explanation-5: -Timeline of the Cell Theory Working from these and other discoveries, Schleiden and Schwann proposed what would become known as the cell theory in 1838.