What are motor skills? You might hear about the development of fine and gross motor skills in the pediatricianâs office, parenting magazines or a baby development book. What exactly are they? This is actually a pretty complicated question.
The cell was first discovered by Robert Hooke in 1665 using a microscope. The first cell theory is credited to the work of Theodor Schwann and Matthias Jakob Schleiden in the 1830s. In this theory the internal contents of cells were called protoplasm and described as a jelly-like substance, sometimes called living jelly.
The atomic nucleus was discovered by Ernest Ruthorford in the 1800's with his gold foil experiment. The earliest records of the biological (or cell) nucleus are from Antonie â¦ van Leeuwenhoek in 1719.2 people found this useful.he atomic nucleus was discovered by Ernest Ruthorford in the 1800's with his gold foil experiment. The earliest records of the biological (or cell) nucleus are from Antonie â¦ van Leeuwenhoek in 1719. 2 people found this useful.