The Darwin of 20th century is Ernst Mayr.

Ernst Mayr was a German-American biologist and ornithologist who is considered as the "Darwin of 20th century" due to his significant contributions to the field of evolutionary biology. He was born in 1904 in Kempten, Germany and died in 2005 in Bedford, Massachusetts, United States.

Contributions to Evolutionary Biology:

1. Biological Species Concept: Mayr introduced the Biological Species Concept which defined a species as a group of individuals that can interbreed and produce viable offspring. This concept is widely accepted in the field of evolutionary biology.

2. Evolutionary Synthesis: Mayr played a crucial role in the development of the Evolutionary Synthesis, which was a unification of genetics and evolutionary biology. He proposed that the evolution of new species occurred due to the accumulation of genetic changes over time.

3. Geographic Speciation: Mayr proposed the theory of geographic speciation, which suggests that the formation of new species occurs when a population is geographically isolated from the parent population.

4. Ornithology: Mayr was also an accomplished ornithologist and contributed significantly to the study of bird species. He proposed the theory of allopatric speciation in birds, which suggests that the formation of new bird species occurs due to geographic isolation.

5. Systematics: Mayr made significant contributions to the field of systematics, which is the study of the classification of living organisms. He proposed the concept of "cladistics", which is a method of classification that groups organisms based on their evolutionary history.

Conclusion:

Ernst Mayr's contributions to the field of evolutionary biology have had a significant impact on our understanding of the process of evolution. His work has helped to shape the field of evolutionary biology and has influenced generations of biologists. Therefore, it is justified to consider him as the "Darwin of 20th century".

The Darwin of 20th century is Ernst Mayr.

Ernst Mayr was a German-American biologist who is considered as the Darwin of the 20th century. He was born on July 5, 1904, and died on February 3, 2005. Mayr was a prominent figure in the field of evolutionary biology and was one of the most influential scientists of the 20th century. He was a prolific writer, with over 700 scientific papers and 25 books to his name.

Contributions to evolutionary biology

Mayr made several significant contributions to the field of evolutionary biology, including:

1. The biological species concept: Mayr developed the concept of the biological species, which defines a species as a group of organisms that can interbreed and produce viable offspring. This concept is widely used in modern biology.

2. The theory of allopatric speciation: Mayr proposed the theory of allopatric speciation, which states that new species arise when populations become geographically isolated from each other.

3. The role of genetics in evolution: Mayr was one of the first biologists to recognize the importance of genetics in evolutionary processes. He helped to integrate genetics and evolutionary biology, which led to the development of the modern synthesis.

4. The importance of variation: Mayr emphasized the importance of genetic variation in evolution. He argued that without variation, natural selection would not be able to act, and evolution would not occur.

Legacy

Mayr's contributions to evolutionary biology have had a significant impact on the field. He helped to establish evolutionary biology as a rigorous scientific discipline and played a key role in the development of the modern synthesis. Mayr's work has also influenced other areas of biology, including ecology and conservation biology.

Conclusion

In summary, Ernst Mayr is considered as the Darwin of the 20th century due to his significant contributions to evolutionary biology. His work has had a profound impact on the field, and his legacy continues to influence scientists today.