Louis Pasteur is widey regarded as father of germ theory.In fact he proved and established the theory rather than coming up with this thiory. Girolamo Fracastoro, Agostino Bassi introduced the theory almost in the modern form.Even many centuries before them many propositions of disease origin by germs or small organisms were suggested by several investigators.The proof of germ theory was devised by Robert Koch by his Koch's postulates.Koch and Pasteur are widely regarded as pioneers or fathers of germ theory.
Schleiden and Schwann
Alfred wegner
Two scientists came up with The Cell Theory. It was in 1839, Matthias Schleidan and Theodor Schwann, two German Biologists came up with this theory.
Even before the medical community had embraced the germ theory, two physicians had observed that the use of sloppy methods and contaminated instruments during surgery led to increased mortality of the surgical patient.
osama bin laden and adolf Hitler
Two scientist from the opposite sides of the world- Max Trautz in 1916 and William Lewis 1918.
for human consumption, wheat germ cereals and wheat germ oil are the two most popular preparations of the grain.
Phyla that have only two germ layers are Cnidaria and Ctenophora. These phyla are considered diploblastic, meaning they develop from two embryonic germ layers: endoderm and ectoderm. organs. This is in contrast to triploblastic animals, which have three germ layers (endoderm, mesoderm, and ectoderm).
Louis Pasteur was the first man to stumble across the germ theory, and was discovered in 1861. This then led to many other diseases being found as everyone know knew that germs caused disease. Robert Koch was one of these scientists and he found the cure for two of the most deadliest diseases from the time: cholera and TB (tuberculosis), with the help from a microsope he was able to isolate the germ that caused the disease and so other scientists could then work on how to cure the diseases.
They have two layers the endoderm and ectoderm.
No they do not. I am not certain as to whether they have 0 or 2 germ layers but it is one of the two.
Prokaryotic cells were the first to evolve and then later Eukariotic cells came along.