Tuesday, 25 February 2020

Darwin’s Evidence

Darwin’s Evidence

One of the obstacles hindering the acceptance of any theory at the time of Darwin's development was the misconception, at the time widely believed, that the Earth was only a few thousand years old. Experimental and observational research since Darwin's original origins were most clearly expressed by expressions of emotion in human form.

The discovery of thick layers of rocks, evidence of extensive and prolonged erosion, and the increasing numbers of diverse and unfamiliar fossils discovered during Darwin’s time made this assertion seem less and less likely. Charles Lyle, a great geologist (1797–1875), whose theories according to geology were read (1830), while Darwin embarked on HMS Beagle, an ancient world in which plant and animal species were constantly going extinct. Others were emerging. Which Darwin tried to explain.

Darwin’s Evidence
Fig. 1. Four Galápagos finches and what they eat.

What Darwin Saw

When HMS Beagle was set, Darwin was fully convinced that the species were immutable, meaning that they were not subject to change. It was not until two or three years after his return that he began to seriously consider that he could change. During his five years aboard the ship, Darwin observed many important events that were of central importance in reaching his full conclusion. Darwin's theory suggests that species distribution patterns across time and space support the development of common ancestral lineages. They considered how to support patterns of variation in domesticated and wild fauna and flora with modifications.

For example, the rich fossils of southern South America, which he has shown to the right, have been seen by the extinct Armadillo fossils. They were similar to armadillos who lived in the same area shown on the left. When the first form did not give rise to the second, why would the fossils living in the area be the same? Later, Darwin's theory was reinforced by the discovery of other examples of fossils that show intermediate characteristics, pointing to this success as a change.

Fossil evidence of evolution
Fig. 2.  Fossil evidence of evolution.

Again and again, Darwin observed that the characteristics of the same species vary from one place to another. These geographers suggested to him that the lineage of organisms changes gradually as individuals move from one place to another in search of new habitats. Darwin encountered a variety of Frenchmen in the Galápagos Islands, 900 kilometers (540 mi) off the coast of Ecuador. 14 species that were slightly different in appearance. Darwin felt that these birds were descended from the South American mainland by a common ancestor blown by the winds several millions of years ago.

By eating different foods on different islands, the species changed in different ways, especially in the shape of their peaks. The large beak of the ground beak on top of 14.5 was preferable to eating seeds of larger size. As generations descended from common ancestors, these ground finals changed and what Darwin called "descendants with modification".

In a general sense, Darwin's fact was that plants and animals were located on the coast near South America on these relatively volcanic islands. If each of these plants and animals were kept only on the Galápagos Islands, why were there no plants and animals from islands with similar climates living on the coast of Africa? Why did they instead resemble the adjacent South American coast?

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