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Structures that share a common ancestory or a similar because they are modified versions of structures from a common ancestor are?
Homologous structures.
Do homologous structures have dissimilar constructions?
No, homologous structures have similar structures and origins but may have different functions. They are inherited from a common ancestor and can be modified over time to perform different roles in different species.
What is a similar structure that related species inherit from a common ancestor?
Homologous structures are similar structures that related species inherit from a common ancestor. These structures may have different functions in different species but share a similar underlying anatomy, suggesting shared evolutionary origins. Examples include the wing of a bird and the flipper of a whale, both being modified versions of the forelimb structure shared by their common ancestor.
The same basic array of bones are modified to give rise to the wing of a bat and the fin of a porpoise such anatomical structure are called?
Homologous structures. These are anatomical structures that have a similar origin in a common ancestor but have modified over time to serve different functions in different species. In this case, the forelimb structure of the bat's wing and the flipper of the porpoise are homologous structures.
What do homologous structure tells us?
That the organisms with homologous structures are of, at least, common ancestry and at most closely related. A backbone is a homologous structure that land and sea dwelling vertebrates possess in common because all can trace the backbone back to a common ancestor in the Precambrian. Now, a dogs front leg and your arm have the same bones, point for point, just differing growth patterns. This shows that you and your dog are closely related as both of you are advanced mammals.
Does passion flower have tendrils?
Yes, they do. The tendrils are slender, coiling, with modified stem structures.
How are analogous replaced or modified?
Analogous structures can be replaced or modified through the process of evolution by natural selection. As organisms adapt to different environments, structures that are homologous may evolve to serve different functions. Over time, mutations and selective pressures can lead to the modification or replacement of analogous structures in different species to better suit their specific needs.
Does hopi ear candling stimulate wax production?
As vertebrates evolved, the same bones were sometimes put to different uses. Yet the bones are still seen, their presence betraying their evolutionary past. For example, the forelimbs of vertebrates are all homologous structures, that is, structures with different appearances and functions that all derived from the same body part in a common ancestor. You can see in figure 22.15 how the bones of the forelimb have been modified in different ways for different verterbates. Why should these very different structures be composed of the same bones? If evolution had not occurred, this would indeed be a riddle. But when we consider that all of these animals are descended from a common ancestor, it is easy to understand that natural selection has modified the same initial starting blocks to serve very different purposes.
How do spines which are modified leaves of cacti become adaptive structures?
they prevent too much loss of water
Does passion flower plant has stem tendril?
Yes they do , The tendrils are slender , coiling , with modified stem structures
Why are leaves perfect for photosynthesis?
They are modified structures. They have concentrated chloroplasts. Also have high surface area to get light.
Are the shell of a turtle and that of snail homologous or analogous?
The shell of a turtle and that of a snail are considered analogous structures because they have different evolutionary origins but serve a similar function as a protective covering. Homologous structures are ones that share a common evolutionary origin, such as the wings of a bat and the arms of a human.
