Lamarckism or Lamarckian evolution refers to the once widely accepted idea that an organism can pass on characteristics that it acquired during its lifetime to its offspring (also known as based on heritability of acquired characteristics or "soft inheritance")
Natural selection (aka survival of the fittest) is a mechanism of evolution. Organisms that are more adapted to their environment are more likely to survive and pass on the genes that aided their success. This process causes species to change and diverge over time.
The whole human family is one species with the same genes. Mutation creates slightly different versions of the same genes, called alleles. These small differences in DNA sequence make every individual unique. They account for the variation we see in human hair color, skin color, height, shape, behavior, and susceptibility to disease. Individuals in other species vary too, in both physical appearance and behavior.
German American physicist Albert Einstein?s theories changed the course of human history and shaped modern physics. He, on the other hand, assumed a static universe although his own theories pointed to an expanding or a shrinking universe. Einstein, however, calibrated his by-then widely accepted theory to make it fit for his assumption. When an American astronomer Edwin Hubble proved beyond doubt that the universe was expanding, Einstein called his own wrong assumption as the biggest blunder of his life. Einstein was neither the first nor the last scientist who fell into this trap.
Under occupation, Danish farmers were banned from raising their home country?s flag. In protest against the flag ban, farmers came up with an ingenious idea. The farmers would raise a new pig breed in protest.
Convergent evolution is when different organisms independently evolve similar traits. For example, sharks and dolphins look relatively similar despite being entirely unrelated. Sharks (opens in new tab) are egg-laying fish with the deadly ability to sniff out blood in the water, while dolphins are curious mammals that navigate by making clicking sounds and listening for their echoes. Those differences aren't too surprising, considering that the duo's last common ancestor swam the seas some 290 million years ago. .
In biology, evolution is the change in the characteristics of a species over several generations and relies on the process of natural selection.
In the second of the nineteenth century a fierce debate broke in the scientific community about Darwin's theory of evolution. However, by the twentieth century the debate was over.
Potatoes grown by cloning are cheap and plentiful, but they share the same genetic information, which makes them vulnerable to the same potato diseases.