An example of a homologous structure that is greatly reduced in size is the pelvic bone in whales. These bones are remnants of hind limbs found in their land-dwelling ancestors, which have evolved to be much smaller and non-functional in whales due to their adaptation to an aquatic lifestyle.
The human organ in the right side of the abdominal cavity that starts with the letter "a" and has unknown use is the appendix. Although the exact function of the appendix is still debated among scientists, it is believed to have a role in the immune system and gut health.
The four types of natural selection are stabilizing selection (where the average phenotype is favored), directional selection (where one extreme phenotype is favored), disruptive selection (where both extreme phenotypes are favored), and sexual selection (where traits that increase mating success are favored).
vestigial structures, which are remnants of ancestral traits that no longer serve a function in the organism. In snakes, these tiny hip and leg bones are reduced in size and no longer used for walking, reflecting their evolution from limbed ancestors.
An Internal Structure is the way an organism looks on the outside and an External Structure is the looks on the outside.
Whales and some other cetaceans have unusable leg bones as a vestigal structure.
vestigal
yes, they have 2 pairs, one is a vestigal structure, the other is used for sensory functions :)
vestigial structure-such as the human appendix, doesn't seem to have a function and may once have functioned in the body of an ancestor..:)
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DSB
The vestigal feature of a kiwi is it's wings.
Vestigial StructureA vestigial structure is a structure that appears to no longer have a use in the body.
An example of a homologous structure that is greatly reduced in size is the pelvic bone in whales. These bones are remnants of hind limbs found in their land-dwelling ancestors, which have evolved to be much smaller and non-functional in whales due to their adaptation to an aquatic lifestyle.
In humans the appendix is a vestigal organ and has no function that we are currently aware of.
The feature of the wing of a bat and the foreleg of an alligator is homologous. This means they have a similar origin in the evolutionary history of vertebrates, as they both share a common ancestral structure.
Vestigal Structures.