Sometimes it is unclear whether similarities in structure in different organisms are analogous or
homologous
. An example of this is the wings of bats and birds. These structures are homologous in that they are in both cases modifications of the forelimb bone structure of early reptiles.
Are the wings of a bat and butterfly homologous or analogous?
A butterfly or bird’s
wings are analogous but not homologous
. Some structures are both analogous and homologous: bird and bat wings are both homologous and analogous. Scientists must determine which type of similarity a feature exhibits to decipher the organisms’ phylogeny.
Are bat and bird wings homologous or analogous quizlet?
Bird and bat wings are homologous as forelimbs because they are similar due to their ancestors. They are
analogous as wings
because they adapted the structures to fly due to their environment.
Are bird and bat wings convergent?
Analogies are the result of convergent evolution. Interestingly, though
bird and bat wings are analogous as wings
, as forelimbs they are homologous. Birds and bats did not inherit wings from a common ancestor with wings, but they did inherit forelimbs from a common ancestor with forelimbs.
Are the wings of an insect and bird homologous?
For example, insects use wings to fly like bats and birds, but the wing structure and embryonic origin is completely different. … These structures are not analogous. The wings of a butterfly and
the wings of a bird are analogous but not homologous
.
How can a bat wing be both a homologous and analogous structure?
Analogies are the result of convergent evolution. Interestingly, though bird and bat wings are analogous as wings, as forelimbs
they are homologous
. Birds and bats did not inherit wings from a common ancestor with wings, but they did inherit forelimbs from a common ancestor with forelimbs.
What structures are analogous?
In evolutionary biology, analogous structures are defined as
biological structures having similar or corresponding functions but not from the same evolutionary origin
. In other words, species use these biological structures for the same purpose and yet these species are from unrelated evolutionary lines.
Are humans still evolving?
It is selection pressure that drives natural selection (‘survival of the fittest’) and it is how we evolved into the species we are today. … Genetic studies have demonstrated
that humans are still evolving
.
Are dolphins and sharks an example of convergent evolution?
We know that dolphins and sharks are not closely related, and they didn’t inherit their similar body shapes from a common ancestor. Their streamlined bodies, dorsal fins and flippers are the result of
convergent evolution
.
What are 2 examples of convergent evolution?
An example of convergent evolution is the
similar nature of the flight/wings of insects, birds, pterosaurs, and bats
. All four serve the same function and are similar in structure, but each evolved independently.
What are 3 examples of homologous structures?
A common example of homologous structures is
the forelimbs of vertebrates
, where the wings of bats and birds, the arms of primates, the front flippers of whales and the forelegs of four-legged vertebrates like dogs and crocodiles are all derived from the same ancestral tetrapod structure.
What is a homologous trait?
Homologies are
traits present in two or more organisms that were inherited from the common ancestor of those organisms
. The human five-fingered hand and the five-toed foot of a lizard, for example, were both inherited from our common ancestor that lived more than 300 Mya (Fig.
What is difference between homologous and analogous organs?
Homologous structures
share a similar embryonic origin
; analogous organs have a similar function. For example, the bones in the front flipper of a whale are homologous to the bones in the human arm. … The wings of a butterfly and the wings of a bird are analogous but not homologous.
What is the strongest evidence of evolution from a common ancestor?
Similar DNA sequences
are the strongest evidence for evolution from a common ancestor.
Which would be considered homologous structures?
The arm of a human, the wing of a bird or a bat, the leg of a dog and the flipper of a dolphin or whale
are homologous structures. They are different and have a different purpose, but they are similar and share common traits. They are considered homologous structures because they have a similar underlying anatomy.
Do bats and butterflies have a common ancestor?
Bats (Vertebrata) are deuterostomes. … The
ancient last common ancestor of the butterfly
and the bat had nothing like wings. This tells us that the wings of the butterfly and the wings of the bat evolved independently, long after their ancestral lineages diverged from the gastrula-like ancestor.
