AP BIOLOGY

Detailed explanation-1: -Matthias Jacob Schleiden was a German botanist who, with Theodor Schwann, cofounded the cell theory . In 1838 Schleiden defined the cell as the basic unit of plant structure, and a year later Schwann defined the cell as the basic unit of animal structure.

Detailed explanation-2: -Initially discovered by Robert Hooke in 1665, the cell has a rich and interesting history that has ultimately given way to many of today’s scientific advancements.

Detailed explanation-3: -published from Berlin Mikroskopische Untersuchungen, in which he demonstrated that Schleiden’s conclusion also applies to animals, thus establishing the cell as the elementary unit common to both plant and animal kingdoms.

Detailed explanation-4: -Even so, he made other accurate observations about plant cells and cell activity and his conclusions marked the beginning of plant cytology. In 1839, Theodor Schwann would expand Schleiden’s cell theory to include the animal world, establishing cell theory as the fundamental concept in biology.