The accurate investigation of the lowest forms of animal life, commenced by Leeuwenhoek and Swammerdam, and continued by the remarkable labours of Reaumur, Abraham Trembley, Bonnet, and a host of other observers in the latter part of the 17th and the first half of the 18th centuries, drew the attention of biologists to the gradation in the complexity of organization which is presented by living beings, and culminated in the doctrine of the echelle des titres, so powerfully and clearly stated by Bonnet, and, before him, adumbrated by Locke and by Leibnitz.
Another stimulus came from the biologists, Pacific. On the 1st of November 1876 a cyclone acting in this who began to realize the importance of a more detailed investigaway submerged a great area of the level plain of the Ganges tion of the life conditions of organisms at great depths in the delta to a depth of 46 ft.; here the influence of the difference sea.
Code breakers and linguists were consulted, chemists and biologists patched up their differences and worked together, and scientific groups were formed to share information and theories.
Mendel's observations constitute an ingenious attempt to throw light on the matter, and in the opinion of some biologists have led to the discovery of an important principle.
Moreover, the very fact itself of the possibility of inheriting acquired moral characteristics is still hotly debated by those biologists with whom should rest the ultimate verdict.