pickles :3
pickles :3
a. the presence of homologous structures b. the presence of vestigial organs
yeah
A vestigial structure is a structure that an organism still has but no longer serves any real definite purpose. In this case, the whiskers on a cat serve a vital purpose, so they are not vestigial structures.
The existence of vestigial structures is significant to the study of evolution because they provide evidence of an organism's ancestral lineage and indicate how species have adapted over time. These structures, which have lost their original function, suggest that evolutionary processes lead to changes in anatomy and functionality in response to environmental pressures. By studying these remnants, scientists can trace evolutionary paths and better understand the mechanisms of natural selection and adaptation. Overall, vestigial structures highlight the dynamic nature of evolution and the relationship between different species.
pickles :3
a. the presence of homologous structures b. the presence of vestigial organs
a
Homologous structures are different forms of animal anatomy which have come from the some origin (a common ancestor), these can be extremely different in appearance and function. For example a bats wing, a seals flipper and a human arm all have common bone and muscle structures suggesting that they all derived from a common ancestor. Vestigial structures are parts of the anatomy which have lost their original function through the evolutionary process and no longer obtain a major functional role in that animals life. For example in human the appendix's original function was to break down cellulose in plant material, other vestigial functions in humans include the coccyx (tailbone) and ear muscles.
homologous structures- same structure/different functions in common ancestors analogous structures-same functions/differnt structures not in common ancestors vestigial-show evolutionary history/structures that arent used anymore (i.e. human appendix/human tailbone)
Those organs are called vestigial organs. They are remnants of functional structures that were more developed in ancestral species but have decreased in size or usefulness in the current organism.
Some structures that related species have inherited from a common ancestor are homologous structures, which are similar in form and function but may have different appearances due to adaptations to different environments. Another example is vestigial structures, which are remnants of structures that were functional in ancestral species but have reduced or lost their original function in descendants. Analogous structures are also seen in related species, having similar functions but different origins, such as the wings of birds and insects.
An arm is an analogous feature because it has evolved independently in different species to serve a similar function, like in the wings of birds and bats. It is not homologous, as it does not share a common evolutionary origin, like the forelimbs of vertebrates. An arm is not vestigial, as it is a functional and adaptive trait that has been retained through evolution for various purposes.
which model of evolution shows change over a relatively short period fo time
Vestigial StructureA vestigial structure is a structure that appears to no longer have a use in the body.
Vestigial Organs
Part 1: Evidence from the Fossil Record Part 2: Evidence from Geographic Distribution of Living Species Part 3: Evidence from Homologous Structures and Vestigial Organs Part 4: Evidence from Embryology