Vestigial structures are structures that no longer fulfill their original purpose. Take wisdom teeth in humans as an example of this. At one time, as we know from the fossil record, human jaws were larger and could accommodate those wisdom teeth. As jaws became smaller wisdom teeth erupted into too small a mouth more and more times over human evolution until very few mouths can accommodate the onset of these teeth and they now are generally pulled at eruption. So, we can see the history of human evolution in our teeth!
Many species have vestigial structures, especially in the animal kingdom. Two good examples are the vestigial legs in whales and some snakes. This is clear evidence that whales and snakes are descended from creatures that had functional legs. This is strong evidence of evolution, since there is no other plausible explanation, religious or scientific, for vestigial structures.
Body parts that are reduced in size with no apparent function would be vestigial limbs. Evolution could be at the root of the development of vestigial limbs. A good example would be a T-Rex with his tiny arms.
Nuclear fusion affects stellar evolution by essentially halting all mitosis and miosis that any cells in a stellar evolution could experience, and they stunt the growth of the object.
Climate change could reduce biodiversity by reducing the populations of many different types of plants and animals.
An oxygen-based metabolism provides more energy than an anaerobic metabolism, allowing for a larger volume-to-surface ratio of organisms. So organisms could grow larger, allowing their tissues to specialize in various ways, which means increasing complexity.
Many species have vestigial structures, especially in the animal kingdom. Two good examples are the vestigial legs in whales and some snakes. This is clear evidence that whales and snakes are descended from creatures that had functional legs. This is strong evidence of evolution, since there is no other plausible explanation, religious or scientific, for vestigial structures.
Body parts that are reduced in size with no apparent function would be vestigial limbs. Evolution could be at the root of the development of vestigial limbs. A good example would be a T-Rex with his tiny arms.
These vestigial structure, hip bones and leg bones, attest to the land dwelling ancestor of whales and the leg bearing ancestor of snakes. The inference is rather simple in whales. How else could a water swimming animal posses vestigial legs. For light amusement read some of the creationist non explanations for these vestigial markers. talkorigins.org
Some sort of defect could change a structure in the heart
Nuclear fusion affects stellar evolution by essentially halting all mitosis and miosis that any cells in a stellar evolution could experience, and they stunt the growth of the object.
The purpose of vestigial ear muscles in humans is believed to be a remnant from our evolutionary past when our ancestors could move their ears to better detect sounds or communicate nonverbally. However, in modern humans, these muscles no longer serve a functional purpose and are considered vestigial.
a Vestigial organ is an organ of the body that doesn't seem to serve any useful purpose, but similar organs in other animals do. It is supposed that our early ancestors had use for the organ but now, as we have evolved, the organ has become redundant. As we continue to evolve, we may lose it altogether. If the theory of evolution is correct, then many animals could be found with vestigial organs. For many years, it was thought that the appendix was vestigial and served no purpose. It was believed to be a vestigial form of the caecum found in many herbivores. Indeed, it probably is. However, we now know that it is wrong to believe the human appendix has no function. It is very important in developing the immune system in foetus and young child and may have a role in recycling haemoglobin from dead red blood cells. But it certainly has lost its role in digestion. It is interesting that organs are sometimes described as vestigial, simply because the scientists haven't yet worked out their real use.
The evolution of a characteristic within one species could indirectly affect the evolution of a characteristic within another species through ecological interactions such as competition or predation. For example, if one species evolves a new defensive trait, it could influence the selection pressures on the predator species, leading to changes in its hunting strategies or morphology. This cascading effect can create a feedback loop where adaptations in one species drive adaptations in another.
A simple coevolution explanation here. A population of rabbits that is running faster, on average, over time is going to affect the population of foxes that pursue the rabbits as food. Some foxes will have variations that lead to faster running and these foxes will be the ones that are reproductively successful and give rise to following generations of foxes.
Yes, Charles Darwin observed that in similar environments, unrelated species could independently evolve similar adaptations to survive and thrive. This phenomenon is known as convergent evolution, where organisms facing similar selective pressures develop similar traits or structures. Darwin's theory of evolution by natural selection explains how this process occurs over time.
The theory of evolution has many criticisms but none have proven evolution wrong. For example, some people argue that the bacterial flagellum is 'irreducibly complex' and therefore can not have evolved, even though the evidence shows that it not only could have, but has.
Climate change could reduce biodiversity by reducing the populations of many different types of plants and animals.