How can you explain why two species that look similar are not necessarily that closely related?

They may go through different developmental and functional stages before they are fully alike. Analogous structures are not necessarily evidence that two species came from a common ancestor. It is more likely they came from two separate branches of the phylogenetic tree and may not be closely related at all.

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How can two species that look very different from each other be more closely related than two species that look similar to each other?

Nature selects the traits that give an organism an advantage over others. These traits are found in many other organisms. What they evolved from differs, but their mutations remain the same/similar.

How two organisms that are not closely related could evolve similar physical characteristics?

In evolutionary biology, convergent evolution is the process whereby organisms not closely related (not monophyletic), independently evolve similar traits as a result of having to adapt to similar environments or ecological niches.

Can two organisms look similar but be members of different species?

Organisms that look alike often belong to the same species, but this isn’t always the case. I for one can’t tell the African fish eagle and the bald eagle apart from the photos below. But they are, in fact, different species. Some species appear similar to one another.

How do you determine if two species are closely related?

Two species are more related if they have a more recent common ancestor, and less related if they have a less recent common ancestor.

How is it possible for two species that look similar to be less related than two species who look completely different?

In general, the more DNA differences in homologous genes (or amino acid differences in the proteins they encode) between two species, the more distantly the species are related.

What is it called when two unrelated organisms look alike?

Convergent. When two unrelated organisms look alike (sharks and dolphins) Biodiversity. Refers to the variety of living things.

Why do animals of different species looks similar?

are anatomical features, of different organisms, that have a similar appearance or function because they were inherited from a common ancestor that also had them. For instance, the forelimb of a bear, the wing of a bird, and your arm have the same functional types of bones as did our shared reptilian ancestor.

How do two species evolve from a common ancestor?

DNA evidence for evolution

If two species have the “same” gene, it is because they inherited it from a common ancestor. In general, the more DNA differences in homologous genes between two species, the more distantly the species are related.

Why might different species evolve in similar ways?

Convergent evolution occurs when species occupy similar ecological niches and adapt in similar ways in response to similar selective pressures. Traits that arise through convergent evolution are referred to as ‘analogous structures’. They are contrasted with ‘homologous structures’, which have a common origin.

What does it mean when two organisms are very similar?

When two organisms share a common ancestor, their genetic code has to be similar. The extent of similarities determines how recently have the organisms evolved.

Can two organisms look alike but have different genotypes?

Due to the presence of a dominant allele, the same phenotype but distinct genotype is possible. A dominant allele always expresses itself when it is present in the genotype.

What makes two animals different species?

Most evolutionary biologists distinguish one species from another based on reproductivity: members of different species either won’t or can’t mate with one another, or, if they do, the resulting offspring are often sterile, unviable, or suffer some other sort of reduced fitness.

How can the same species look different?

Within the same species, individual organisms can look very different. For all three species of butterflies, wing color and pattern varies depending on the season during which they were born. The butterflies at the top were born under different temperature and light conditions than the ones at the bottom.

Are organisms alike or genetically different?

Comparing Human Genetic Similarity to Other Life Forms

Of the three billion genetic building blocks that make us living things, only a handful are uniquely ours. In fact, despite our differences on the outside, humans are 99.9% genetically similar to one another.

Why do different species have different traits?

Different organisms vary in how they look and function because they have different inherited information; the environment also affects the traits that an organism develops. In sexual reproduction, each parent contributes half of the genes acquired by the offspring resulting in variation between parent and offspring.

Why do animals look alike?

It was previously “The genetic ‘switch’ that makes many animals look alike as embryos”. An international team of researchers, led by Dr Ozren Bogdanovic and Professor Ryan Lister from the University of Western Australia, have found the genetic “switch” that causes one species of animal to look similar to another.

What would two organisms that are closely related have?

In a phylogenetic tree, the relatedness of two species has a very specific meaning. Two species are more related if they have a more recent common ancestor, and less related if they have a less recent common ancestor.

What is the best way to determine how closely organisms are closely related group of answer choices?

2. What is the best way to determine if two species are closely related? The best way is to compare the DNA of the two species. The more nitrogenous bases and amino acids two species have in common, the more closely related they are.

When unrelated species evolve similar characteristics?

Convergent evolution is when different organisms independently evolve similar traits. For example, sharks and dolphins look relatively similar despite being entirely unrelated.

Why do some unrelated species look similar to each other?

You might have noticed that many unrelated species around the world have similar features. This is caused by convergent evolution. This form of evolution happens when two or more species which do not have a recent common ancestor occupy similar niches in different parts of the world.

How closely species are related?

Similarities and differences among biological molecules (e.g., in the DNA sequence of genes) can be used to determine species’ relatedness. Biogeographical patterns provide clues about how species, both alive and extinct, are related to each other.

When unrelated organisms living under similar environmental demands evolve superficially similar structures it is called?

When unrelated organisms living under similar environmental demands evolve superficially similar structures is called. Convergent Evolution.

What is it called when two species evolve together?

coevolution, the process of reciprocal evolutionary change that occurs between pairs of species or among groups of species as they interact with one another.

Is the evolutionary process in which two or more unrelated organisms evolve to look alike quizlet?

The process by which unrelated organisms come to resemble one another is called convergent evolution.

Which features are similar in use and evolve in similar environments but do not evolve from a common ancestor?

Convergent evolution is the independent evolution of similar features in species of different periods or epochs in time. Convergent evolution creates analogous structures that have similar form or function but were not present in the last common ancestor of those groups.

What are some reasons that similar traits might arise independently in species that are only distantly related?

What are some reasons that similar traits might arise independently in species that are only distantly related? Can you think of examples among familiar organisms? A reason that they might arise independently is because of convergent evolution.

Why some organisms that appear very closely related on a phylogenetic tree may not actually be closely related?

Organisms may be very closely related, even though they look quite different, due to a minor genetic change that caused a major morphological difference. Unrelated organisms may appear very similar because both organisms developed common adaptations that evolved within similar environmental conditions.

What are the similarities between convergent and divergent evolution?

Both convergent and divergent evolution have contributed to the development of present organisms from the past organisms. Both convergent and divergent evolution generate variation, aiding species to perform their niche in the environment.

Which two organisms are genetically the most similar?

Although figures vary from study to study, it’s currently generally accepted that chimpanzees (Pan troglodytes) and their close relatives the bonobos (Pan paniscus) are both humans’ closest-living relatives, with each species sharing around 98.7% of our DNA.

Which is most likely true about two organisms with similar anatomical features?

Which is most likely true about two organisms with similar anatomical features? They are not related.

When similar traits evolve independently in species that do not share common ancestry it is called divergent evolution?

Convergent evolution is the opposite of divergent evolution, in which related species evolve different traits. Convergent evolution is similar to parallel evolution, in which two similar but independent species evolve in the same direction and independently acquire similar characteristics.

When two organisms share similar traits but don’t share a common ancestor These species are an example of?

Convergent evolution is the process by which two species develop similar features despite not sharing a recent common ancestor. Evolutionary biologists explain these similar characteristics as the product of natural selection.

Why do some types of organisms have similar appearances while other types of organisms appear very different?

Organisms may be very closely related, even though they look quite different, due to a minor genetic change that caused a major morphological difference. Unrelated organisms may appear very similar because both organisms developed common adaptations that evolved within similar environmental conditions.

Is it possible for two organisms with the same genotype to have different phenotypes explain your answer?

An organism’s genotype is a major (the largest by far for morphology) influencing factor in the development of its phenotype, but it is not the only one. Even two organisms with identical genotypes normally differ in their phenotypes. One experiences this in everyday life with monozygous (i.e. identical) twins.

How can you have different genotypes but the same phenotype?

In addition, different genotypes can lead to the same phenotype. This happens because genes have different alleles. For some genes and traits, certain alleles are dominant while others are recessive.

Which statement describes how two organisms may show the same trait yet have different genotypes for that phenotype?

Which statement describes how two organisms may show the same trait, yet have different genotypes for that phenotype? Both are homozygous for the dominant trait.

Can two different species be related?

Broadly speaking, different species are unable to interbreed and produce healthy, fertile offspring due to barriers called mechanisms of reproductive isolation. These barriers can be split into two categories based on when they act: prezygotic and postzygotic.

What is the difference between the two species?

Scientists have long believed that the difference between two species came down to reproductive incompatibility as a result of adapting to different environments. But researchers recently found that may not be the case — it’s actually in the genes.

How do species differ genetically?

Genetic variation within a species can result from a few different sources. Mutations, the changes in the sequences of genes in DNA, are one source of genetic variation. Another source is gene flow, or the movement of genes between different groups of organisms.

What does it mean when two organisms are very similar?

When two organisms share a common ancestor, their genetic code has to be similar. The extent of similarities determines how recently have the organisms evolved.

What are the similar species with different characteristics?

Convergent evolution is when different organisms independently evolve similar traits. For example, sharks and dolphins look relatively similar despite being entirely unrelated.

Why do individuals of the same species vary in how they look function and behave?

Offspring acquire a mix of traits from their biological parents. Different organisms vary in how they look and function because they have different inherited information. In each kind of organism there is variation in the traits themselves, and different kinds of organisms may have different versions of the trait.

Why do animals have similar faces?

King penguins, like most animals, have very similar faces, probably because vocalization, not sight, is the main way they recognize one another. Humans, on the other hand, depend on visual recognition, leading to the evolution of individually unique faces.

Why do mammals look alike?

Although they are very different species, fish and dolphins (mammals) look similar. Their body shape is highly streamlined: both have fins and a tail. Evolution appears to have repeated itself in producing these two animals that are formed alike.

Which two organisms are most closely related Why?

Humans, chimpanzees, gorillas, orangutans and their extinct ancestors form a family of organisms known as the Hominidae. Researchers generally agree that among the living animals in this group, humans are most closely related to chimpanzees, judging from comparisons of anatomy and genetics.

Which organism is least closely related?

The level of classification that contains organisms most closely related is species. The level of classification that contains organisms least closely related is kingdom.

What is it called when two unrelated organisms look alike?

Convergent. When two unrelated organisms look alike (sharks and dolphins) Biodiversity. Refers to the variety of living things.

How do two species evolve from a common ancestor?

DNA evidence for evolution

If two species have the “same” gene, it is because they inherited it from a common ancestor. In general, the more DNA differences in homologous genes between two species, the more distantly the species are related.

Why do animals of different species looks similar?

are anatomical features, of different organisms, that have a similar appearance or function because they were inherited from a common ancestor that also had them. For instance, the forelimb of a bear, the wing of a bird, and your arm have the same functional types of bones as did our shared reptilian ancestor.

Why do some species look alike?

Convergent evolution is when non-related organisms evolve extremely similar characteristics completely separately. They develop these characteristics because they live in similar environments or ecological niches. Similar environments impose similar challenges, and traits improving survival are favoured.

Why do some unrelated species look similar to each other?

You might have noticed that many unrelated species around the world have similar features. This is caused by convergent evolution. This form of evolution happens when two or more species which do not have a recent common ancestor occupy similar niches in different parts of the world.

How do you know if species are closely related?

Two species are more related if they have a more recent common ancestor, and less related if they have a less recent common ancestor.

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