Relationship between divergent evolution and homologous structures

Divergent Evolution - Definition and Examples | Biology Dictionary

relationship between divergent evolution and homologous structures

Homology is a relationship defined between structures or DNA derived from a Convergent evolution is the opposite of divergent evolution, in which related. Health · Personal Finance · Home & Garden · Pets · Relationships · Sports · Religion Divergent evolution is the process in which a trait held by a common share a common evolutionary origin, these are examples of homologous structures. Effects other than physical separation prevent interbreeding between the two. Through divergent evolution, organisms may develop homologous structures. It is generally speculated that a greater number of differences between related.

Difference Between Convergent and Divergent Evolution

The bat wing is a membrane stretched across four extremely elongated fingers and the legs. The airfoil of the bird wing is made of feathersstrongly attached to the forearm the ulna and the highly fused bones of the wrist and hand the carpometacarpuswith only tiny remnants of two fingers remaining, each anchoring a single feather.

relationship between divergent evolution and homologous structures

So, while the wings of bats and birds are functionally convergent, they are not anatomically convergent. This improves skin flexibility, a trait useful for flying animals; other mammals have a far lower concentration.

relationship between divergent evolution and homologous structures

The mouthparts of different insect groups consist of a set of homologous organs, specialised for the dietary intake of that insect group. Convergent evolution of many groups of insects led from original biting-chewing mouthparts to different, more specialised, derived function types.

These include, for example, the proboscis of flower-visiting insects such as bees and flower beetles[37] [38] [39] or the biting-sucking mouthparts of blood-sucking insects such as fleas and mosquitos.

Divergent evolution - Wikipedia

Opposable thumbs Opposable thumbs allowing the grasping of objects are most often associated with primateslike humans, monkeys, apes, and lemurs.

Opposable thumbs also evolved in giant pandasbut these are completely different in structure, having six fingers including the thumb, which develops from a wrist bone entirely separately from other fingers.

relationship between divergent evolution and homologous structures

Convergent evolution in humans includes blue eye colour and light skin colour. When humans migrated out of Africathey moved to more northern latitudes with less intense sunlight. It was beneficial to them to reduce their skin pigmentation.

Convergent Evolution

It appears certain that there was some lightening of skin colour before European and East Asian lineages diverged, as there are some skin-lightening genetic differences that are common to both groups. However, after the lineages diverged and became genetically isolated, the skin of both groups lightened more, and that additional lightening was due to different genetic changes. Lemurs and humans are both primates.

When the ancestral form of finches initially colonized each island, each group contained individuals who were able to better adapt to the conditions and the available food source. These individuals survived and reproduced in their new habitat. In doing so, the genes that controlled for certain favorable aspects e.

Convergent evolution - Wikipedia

This is the process of natural selection. This is because gene flow between islands is limited when migration is not constant; however, the scale of the effect depends on the dispersal ability of the organism. The Evolution of Primates All of the primates on Earth evolved from a single common ancestor, most likely a primate-like, insectivore mammal, which lived around 65 million years ago in the Mesozoic Era.

Fossil evidence suggests that these primitive animals lived an arboreal life, with good eyesight and hands and feet adapted to climbing through trees. Around 55 million years ago, the first true primates evolved, diverging into the prosimians and simians.

Ancestral prosimians mostly resembled modern prosimians, which include the lemurs endemic to Madagascarlorises, tarsiers and bush babies.

These are small-brained and relatively small-bodied, with a wet nose similar to that of a dog. The next big divergence occurred around 35 million years ago in the other phylogenetic branch of primates, the simians.

Divergent Evolution

This event resulted in the divergence of the common ancestor of all New World monkeys and Old World monkeys. It is speculated that the two groups underwent divergent evolution as a consequence of allopatric speciation. As the continents of America and Eurasia had by this point separated, the split could have been caused by a chance migration across the Atlantic Ocean. They evolved flat noses and prehensile tails, which act as a fifth limb and have the ability to grasp on to trees and branches.

These include familiar families such as capuchins and spider monkeys family: Cebidaemarmosets Callitrichidaeand howler monkeys Atelidae.

  • Difference between Convergent and Divergent Evolution
  • Divergent evolution
  • Convergent evolution

The common ancestor of the Old World monkeys and apes split around 25 million years ago. Divergent evolution demonstrates how species can have common homologous anatomical structures which have evolved for different purposes. Convergent evolution happens in organisms that are not closely related while divergent evolution is observed in organisms that are closely related. The relationship between the analogous structures in different species that evolved through convergent evolution can be less distinct compared to the homologous structures seen in divergent evolution which have the same basic structural plan.

relationship between divergent evolution and homologous structures

References Convergent and Divergent Evolution. Retrieved October 4,from https: Retrieved October 4,from http: