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A good example is the degraded eyes of blind fish and salamanders.

Vestigial organs could be defined as organs or parts of human, plant and animal bodies that do not have any clear function and are considered to be residual parts from their respective ancestors. Vestigial organs are proof that all living organisms have evolved over time and are also helpful in explaining adaptation.

These organs are generally homologous to organs that function normally in other species, which is why they can be considered as evidence of evolution. The existence of vestigial traits can be attributed to changes in the environment or behaviour patterns of an organism. If a function of a trait is no longer beneficial for the survival of an organism, the chances of its future offspring inheriting the trait’s normal form would be lower. The transition will take place over many generations and the trait may also be eliminated through genetic drift and other random events. It should be mentioned that gene mutation which can result in a change in protein structures can also give rise to vestigial organs. A good example is the degraded eyes of blind fish and salamanders. Mutation in genes have increased the number of taste buds in their tongue but have made them blind. [Image Will be Uploaded Soon]

Below we will talk about different types of human, animal and plant vestigial organs.

Q: What is a Vestigial Reflex? A:  A vestigial response in a species can be defined as a reflex that has lost its original function. In humans some examples are

Q: Why are Sinuses Vestigial? A: Sinuses are a non-vital organ. They are present as four air-filled holes behind the nose and around your eyes. Minor functions of sinuses include helping your voice to resonate and make your head feel light. Sinuses can be surgically removed if necessary. These are some of the reasons that sinuses are considered vestigial. Q: How do Vestigial Organs Support the Doctrine of Evolution? A:  Charles Darwin noted vestigial organs in both humans and animals are evidence for evolution. These organs in one species are similar to completely functioning organs in another species. With respect to this fact, biologists have come to a common notion that two different creatures can share a common ancestor. According to organic evolution, modern plants and animals have gradually evolved from simple forms over the course of millions of years. As they evolved, the lost the use of some organs which became vestigial. Thus, the presence of vestigial organs does support the doctrine of evolution.

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