Which Word Group Shows Parallelism Glowing to Travel Birds and Dogs
Homologous Structure Examples in Different Organisms
What is a homologous structure? It is an example of an organ or bone with similar underlying anatomical features found in dissimilar animals. These structures support the idea that the different animals descend from a common ancestor and serve as evidence of development.
Mollusk next to grass as homologous structure examples
In other words, these examples of homology occur when very different animals have bones or other structures that appear very similar in form merely not in role. Significant that, despite their outward differences, animals with homologous structures are somehow related.
Homologous Structures Humans Share With Animals
Hither are some examples of homologous structures that humans share with other creatures from the animal kingdom.
- A dolphin's flipper, a bird's wing, a true cat'south leg, and a human arm are considered homologous structures. Whereas human being beings have bones such every bit the humerus (upper arm), ulna and radius (forearm), carpals (wrist bones), metacarpals (hand basic), and phalanges (fingers), these features appear as like bones in course in the other animals. Bats, whales, and many other animals have very similar homologous structures, demonstrating that these creatures all had a common ancestor.
- The tailbone in human being beings is so-named because information technology is a homologous structure to the beginning of many animals' tails, such every bit monkeys. It is known as a "vestigial construction" because it is the concluding vestige of what was once a tail. This construction serves as testify of having a common ancestor, 1 that would take had a tail.
- All mammals share the homologous structure of the vertebrae in common. For instance, in spite of its tiptop, the giraffe has the very aforementioned number of neck bones (seven) as a giant whale and a tiny human being.
- Human beings, dogs, and cats all have similar pelvises, which are homologous structures to a vestigial pair of bones in snakes. These bones in snakes are the concluding remains of a pelvis, with no legs to attach.
- Human eyes are homologous to the heart bulbs which blind creatures who live in caves -- similar cavern fish -- have on their heads.
More Examples of Homologous Structures in Nature
You'll detect commonalities within a various group of animals in the wild, whether on land, in the body of water or in the air.
- All mollusks have a "pes" that they use to travel. This foot is homologous although it may not appear to be immediately. Closer inspection demonstrates that in terms of course and role, gastropods (like snails), cephalopods (like squid), and bivalves (like mussels) share this homologous structure in mutual.
- All organisms contain homologous plasma membranes with what is called a phospholipid bilayer.
- A homologous structure in the panda looks similar a sixth appendage, but it is actually a modified wrist bone that helps the panda pick leaves off the trees more dexterously.
- An auditory bone that exists within the ears of mammals is a homologous structure to a reptile's jawbone, including dinosaurs.
- Wasps and bees have stingers that they tin utilise when they feel they are in danger. This is a homologous construction to the ovipositor of other organisms similar insects and certain fish; the feature allows these organisms to lay eggs.
Analogous Structures Also
Now that you have seen these examples of homologous structures, you tin observe many different examples in nature.
A related concept is the coordinating structure. Whereas homologous structures bespeak to a similar origin and a common ancestor, analogous structures are when animals have similar structures with similar function, but they evolved separately. Examples include the wings on butterflies, bats, and birds. They're all used to fly, but the animals are non directly related.
For more interesting insights into the creature kingdom, explore these Examples of Development too.
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