Are the wings of a bat and bird homologous or analogous?

Are the wings of a bat and bird homologous or analogous?

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 dragonfly wings homologous?

The wing of a dragonfly (left) and the wing of a butterfly (right) are homologous — they were both inherited from an ancient flying insect. They are homologous structures, inherited from a common ancestor with incisor teeth.

How can a bat’s wing be homologous and analogous?

Bird wings consist of feathers extending all along the arm. 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 bat wings and insect wings homologous?

For example, insects use wings to fly like bats and birds, but the wing structure and embryonic origin is completely different. These are analogous structures (Figure 2). Some structures are both analogous and homologous: bird and bat wings are both homologous and analogous.

What are 3 examples of homologous structures?

Homologous Structures Humans Share With Animals

• A dolphin’s flipper, a bird’s wing, a cat’s leg, and a human arm are considered homologous structures.
• The tailbone in human beings is so-named because it is a homologous structure to the beginning of many animals’ tails, such as monkeys.

What is the strongest evidence of evolution from a common ancestor?

Comparing DNA Similar DNA sequences are the strongest evidence for evolution from a common ancestor.

What are 4 types of evidence that support evolution?

Evidence for evolution

• Anatomy. Species may share similar physical features because the feature was present in a common ancestor (homologous structures).
• Molecular biology. DNA and the genetic code reflect the shared ancestry of life.
• Biogeography.
• Fossils.
• Direct observation.

What are the 7 patterns of evolution?

Groups of species undergo various kinds of natural selection and, over time, may engage in several patterns of evolution: convergent evolution, divergent evolution, parallel evolution, and coevolution.

What are the 5 evidence of evolution?

There are five lines of evidence that support evolution: the fossil record, biogeography, comparative anatomy, comparative embryology, and molecular biology.

What evidence is used to support evolution?

Five types of evidence for evolution are discussed in this section: ancient organism remains, fossil layers, similarities among organisms alive today, similarities in DNA, and similarities of embryos.

What is biogeographical evidence of evolution?

Biogeography, the study of the geographical distribution of organisms, provides information about how and when species may have evolved. Fossils provide evidence of long-term evolutionary changes, documenting the past existence of species that are now extinct.

What is a good example of evolution?

Flightless Birds Over many generations, ostriches and emus evolved to have larger bodies and feet made for running on land, which left them without the ability (or need) to fly. The same goes for penguins, who traded typical wings for swim-friendly flippers over many thousands of generations.

Who is the father of evolution?

Charles Darwin

What does evolved mean?

to come forth gradually into being; develop; undergo evolution: The whole idea evolved from a casual remark. Biology. to develop by a process of evolution to a different adaptive state or condition: The human species evolved from an ancestor that was probably arboreal.

What humans evolved from?

Modern humans originated in Africa within the past 200,000 years and evolved from their most likely recent common ancestor, Homo erectus, which means ‘upright man’ in Latin. Homo erectus is an extinct species of human that lived between 1.9 million and 135,000 years ago.

Who was the first person to ever be born?

Adam

Did humans used to be monkeys?

Humans and monkeys are both primates. But humans are not descended from monkeys or any other primate living today. We do share a common ape ancestor with chimpanzees. It lived between 8 and 6 million years ago.

What race was first human?

Homo erectus were the first of the hominins to emigrate from Africa, and, from 1.8 to 1.3 million years ago, this species spread through Africa, Asia, and Europe. One population of H. erectus, also sometimes classified as a separate species Homo ergaster, remained in Africa and evolved into Homo sapiens.

How many humans have there ever been?

An estimate on the “total number of people who have ever lived” as of 1995 was calculated by Haub (1995) at “about 105 billion births since the dawn of the human race” with a cut-off date at 50,000 BC (beginning of the Upper Paleolithic), and inclusion of a high infant mortality rate throughout pre-modern history.

How many humans have died till now?

Assuming a constant growth rate and birth rates of 80 per 1000 through 1 A.D., 60 per 1000 from 2 A.D. to 1750, and the low 30s per 1000 by modern times, 105 billion people have lived on earth, of whom 5.5% are alive today.

How many races are there on Earth?

The world population can be divided into 4 major races, namely white/Caucasian, Mongoloid/Asian, Negroid/Black, and Australoid. This is based on a racial classification made by Carleton S. Coon in 1962.