According to this theory, animal population was slowly beginning to accelerate, then once it reaches a maximum, then growth slows down.
Von Liebig states that plant growth was dependent on that are granted in minimum quantity.
William Bowman said an accurate statement about the nephron (kidney unit) allowed psychologists to address an issue of how the kidney separates waste from the blood.
Owen Richards concept of homology was, that of the same organ in different animals under all varieties of form and function.
Ludwig showed that this unit functions as a passive filter and that the filtrate that passes through it from the blood carries into the renal tubules.
The power to perform mechanical work always tends to decrease unless energy is added from without
This investigator made sketches of bodies, later known to be chromosomes, in nuclei of pollen mother cells
The amount of blood distributed to the various tissues by small arterioles was regulated by vasomotor nerves of the sympathetic nervous system
Showed that the phenomena of nervous activity could be measured experimentally and expressed numerically
This was a big milestone, although, 20 years later the concept of fertilization was formed.