Naegeli was an early proponent and defender of Darwin. The correspondence preserved in the Naegeli family contains many important letters between Naegeli and his contemporaries. Those from Mendel to Naegeli have
Darwin’s theory of evolution had a significant impact on the U.S. immigration policy in the late nineteenth century. Politicians using the scientific justification enacted laws to limit the immigration of those they did not believe were worthy of becoming Americans. Politicians justified this “pseu...
Charles Darwin proposed group selection to explain how “altruistic” behaviors toward others and self-sacrifice for the group, which could easily be taken to be counterexamples to his theory of evolution, might instead be examples of its explanatory power. He observed …Continue reading→ ...
But technology also refers to the invention of the first chipped stone tools or the development of the steam engine, which brought about the first Industrial Revolution. The term comes from the combination of the Greek words techne (art, craft) and logos (word, speech) and is nothing more ...
While conducting research on the physiology of facial expressions in the mid-19th century, the French neurologist Guillaume Duchenne identified two distinct types of smiles, one of which later became named after him. 6 It is named after Pan American World Airways (an airline that no longer exists...
We meet with no such evidence, and this is the most obvious and forcible of the many objections which may be urged against my theory.”Charles Darwin Mutation of the FOXP2 gene Saturday, February 28th 1953 was an important day for modern science. James Watson and Francis Crick announced to...
Using these five elements, Darwin illustrates how evolution works in nature. The points labeled with capital letters on the horizontal lines at the bottom des- ignate the original moments in which variation begins to lead to divergence of char- acteristics, which in the end brings about ...
It began a conceptual pathway which led to the modern explanation of development in terms of genomic functions. By 1902–1904, the alternative approach it had forced on Boveri had provided experimental evidence that was incontrovertible and could not be ignored. In the 21st century biology of ...
2. Which of the following best describes Xu's mother? A.Strict but interesting B.Kind but uneducated C.Helpful and hardworking D.Supportive and open-minded3. Why did Xu prefer walking during his travels? A.It gave him the chance to meet different kinds of people. B.It helped him to ...
The importance of the permeability question for cellular biology at the turn of the century cannot be overstated. It was obvious that a cell's survival depended on the ability to control and direct the exchange of all sorts of substances between its interior and the surrounding environment, be ...