Which the following are 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 an example of homologous?

Homologous structures are similar physical features in organisms that share a common ancestor, but the features serve completely different functions. An example of homologous structures are the limbs of humans, cats, whales, and bats. … An example of this are the wings of a bat and the wings of a bird.

What is the best example of homologous?

A great example of homologous structures are the wings of a bat and the arms of a human. Bats and humans are both mammals, so they share a common ancestry. Both a bat’s wing and a human’s arm share a similar internal bone structure, even though they look very different externally.

What are the 3 types of homologies?

The three types of homology are molecular, developmental, and structural homology. Molecular homology refers to the similarities of molecules across different species.

What are fins homologous to?

The paired fins in fish and limbs in tetrapods are a good example of homologous organs. They were derived from locomotive organs in common ancestors of vertebrates, and they share many developmental processes and genetic networks.

What are homologous organs give example?

  • Homologous organ the traits inherited by two different organisms from common ancestry.
  • Organs such as bat’s wing, wings of birds, seal’s flipper, forelimb of a horse, and human arm have common underlying anatomy that was present in their last common ancestor.

What are the types of homology?

Usually two types of homology are considered, one (called “phylogenetic” or “evolutionary”) between species, the other (called “serial”, “iterative” or “homonomy”) within individuals.

What are the two types of homologies?

Homology is a key concept in comparative anatomy; two important types are historical homology (the similarity of organisms due to common ancestry) and serial homology (the similarity of repeated structures within an organism).

What are homologous organs 12?

An organ is known as a homologous organ if they have the same ancestor but the function differs. An organ is known as an analogous organ if they have the same structure but the ancestor differs. These organs have very similar structure and they perform nearly the same function.

What is homology in evolution?

The fundamental concept of evolutionary homology is not difficult to describe: homologies are those features that are similar in structure and position in two or more organisms because these features existed in and were inherited from a common ancestor (for additional discussion of homology see Thanukos 2008).

Which of the following pairs are best examples of homologous structures?

The correct answer is (B) Bat wing and human hand. Homologous structures are similar structures that arise through divergent evolution from a common…

Which are examples of homologous structures quizlet?

Examples of homologous structures are the bones of a cat’s leg, bird’s wing, whale’s flipper and a human arm. They are homologous because they formed from the same embryonic tissue but developed into different mature structures.

What is embryonic homology?

Embryonic homologies. … Homologous structures are those organs whose underlying similarity arises from their being derived from a common ancestral structure. For example, the wing of a bird and the forelimb of a human are homologous. Moreover, their respective parts are homologous (Figure 1.13).

What are homologous in chemistry?

A homologue (also spelled as homolog) is a compound belonging to a series of compounds differing from each other by a repeating unit, such as a methylene bridge −CH. 2. −, a peptide residue, etc.

What is a homology quizlet?

characteristic shared by two species (or taxa) that is similar because of common ancestor.

How Vertebrate brains are homologous?

The hearts in various vertebrates such as fishes, amphibians, reptiles, birds and mammals are homologous. They show similarity in the basic plan but they have a varied degree of specialization according to the habitat in which they live, energy requirements and scale of evolution.

What is homologous in biology?

homology, in biology, similarity of the structure, physiology, or development of different species of organisms based upon their descent from a common evolutionary ancestor.

What’s an example of convergent evolution?

Convergent evolution is when different organisms independently evolve similar traits. For example, sharks and dolphins look relatively similar despite being entirely unrelated. … Another lineage stayed put in the ocean, undergoing tweaks to become the modern shark.

What are the six bones found in all tetrapod legs quizlet?

What are the six bones found in all tetrapod legs? Humorous, radius, ulna, carpels, metacarpals, and phalanges. What did the common ancestor of all modern tetrapods look like? The limbs were with one long bone, the humorous, attached to two other long bones called the radius and ulna.

How are Darwin’s finches an example of divergent evolution?

Darwin’s finches are a clear and famous example of divergent evolution, in which an ancestral species radiates into a number of descendant species with both similar and different traits.