von Mohl developed the idea that the nucleus of the cell was within the granular, colloidal material that made up the main substance of the cell. In 1846 he named this substance protoplasm
Gregor Mendel did not contribute to cell theory. Mendel is known for his work in genetics and the study of inheritance through experiments with pea plants. Cell theory was formulated by scientists like Matthias Schleiden, Theodor Schwann, and Rudolf Virchow.
Aristotle did not directly contribute to cell theory, as this theory was developed much later in the 19th century. However, his work on biology did lay the foundation for understanding organisms and their structures, which later contributed to the development of cell theory. Aristotle's ideas about the structure and function of organisms helped guide early scientists in their studies of cells.
Schwann
The presence of sarcode in cells was noted by botanist Hugo von Mohl in the mid-19th century. Sarcode is a term used to describe the granular material found in cells that we now know to be composed of cytoplasm.
Theodor Schwann contributed to the cell theory in the 1830s. Alongside Matthias Schleiden, he proposed that all living organisms are composed of cells, which led to the formulation of the cell theory.
The name of the theory that Schleiden and Schwann developed is the cell theory.
He said that cells can reproduce cell
nothing
she didn't
he stated that the cell is a structural unit of an organism.
plants are composed of cells
1965
James Watson
James Watson
Zacharias Janssen did not contribute to the cell theory. He is credited with inventing the first compound microscope in the late 16th century with his father, Hans Janssen. This invention was crucial for the development of cell theory by later scientists.
Gregor Mendel did not contribute to cell theory. Mendel is known for his work in genetics and the study of inheritance through experiments with pea plants. Cell theory was formulated by scientists like Matthias Schleiden, Theodor Schwann, and Rudolf Virchow.
Robert Brown discovered the nucleus