150 years, after microscopes were invented.
The cell theory began to develop in the mid-17th century with the observations of early microscopists like Robert Hooke and Antonie van Leeuwenhoek. It took a few hundred years for the theory to fully develop and be widely accepted, with contributions from scientists like Matthias Schleiden, Theodor Schwann, and Rudolf Virchow in the 19th century.
Theory-practice-theory take existing theory in education, apply to distance learning, develop new theory Practice-research-theory see what is happening in distance learning, submit to research, develop theory from results Theory-theory-research/practice build on an initial theory to develop a second theory, then apply and test it
Developing the cell theory took time because early microscopes were limited in their capabilities and resolution. It required advancements in microscope technology and techniques to observe and understand the structure of cells. Additionally, multiple scientists had to contribute different pieces of evidence before the comprehensive cell theory was formulated in the 19th century.
1 month
About five years.
Patience.
imediately
It's May be take 2 days
A person does not 'develop' autism - a person is born autistic.
From the time your breasts begin to develop, it should take two to three years to completely develop, however some girls do develop slower or faster than that.
Eight thousands years
1/2 years