How does homologous structures relate to evolution?
Summary. Multiple types of evidence support the theory of evolution: Homologous structures provide evidence for common ancestry, while analogous structures show that similar selective pressures can produce similar adaptations (beneficial features).
What is the relationship between the number of homologous structures and how closely related two species are to each other?
HOMOLOGOUS STRUCTURES ‐ structures such as bones that are similar in many different ortganisms that have shared a recent common ancestor. The more alike the structures are the more closely related the organisms are to one another.
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.
How can you explain why two species that look similar are not necessarily that closely related?
Just because species look or behave the same doesn’t mean they are closely related. 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.
What is an example of convergence?
The definition of convergence refers to two or more things coming together, joining together or evolving into one. An example of convergence is when a crowd of people all move together into a unified group. A meeting place. A town at the convergence of two rivers.
What is an example of a convergent?
The Washington-Oregon coastline of the United States is an example of this type of convergent plate boundary. The Andes Mountain Range of western South America is another example of a convergent boundary between an oceanic and continental plate. Here the Nazca Plate is subducting beneath the South American plate.
What are two examples of convergent boundaries?
Examples of continent-continent convergent boundaries are the collision of the India Plate with the Eurasian Plate, creating the Himalaya Mountains, and the collision of the African Plate with the Eurasian Plate, creating the series of ranges extending from the Alps in Europe to the Zagros Mountains in Iran.
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.
What is the meaning of co evolve?
co·ev·o·lu·tion (kō′ĕv-ə-lo͞o′shən, -ē-və-) The process by which two or more interacting species evolve together, each changing as a result of changes in the other or others. It occurs, for example, between predators and prey and between insects and the flowers that they pollinate. co′ev·o·lu′tion·ar·y adj.
What is convergent evolution and why does it occur?
Convergent evolution is a process in biology. It occurs when two species from unrelated lines develop the same traits or features. This happens because they live in similar habitats, and have to develop solutions to the same kind of problems. Similarity in traits can occur in two ways.
Can behavior be used as evidence for evolution?
Behavior has been viewed as a pacemaker of evolutionary change because changes in behavior are thought to expose organisms to novel selection pressures and result in rapid evolution of morphological, life history and physiological traits.
What is coevolution give an example?
In the context of evolutionary biology, coevolution refers to the evolution of at least two species, which occurs in a mutually dependent manner. An example is the coevolution of flowering plants and associated pollinators (e.g., bees, birds, and other insect species).
What is an example of a homologous trait?
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.
What are some examples of analogous terms?
Analogous terms are those which apply to two different things that both have something in common and something that separates the two terms. The term “backup,” which refers both to a computer backup and police backup, is an example of two similar but different terms using the same word.
What is the meaning of analogous?
: similar or comparable to something else either in general or in some specific detail Timbre in music is analogous to color in painting.—
What is story analogous?
An analogy is something that shows how two things are alike, but with the ultimate goal of making a point about this comparison. The purpose of an analogy is not merely to show, but also to explain. For this reason, an analogy is more complex than a simile or a metaphor, which aim only to show without explaining.
What is analogy in figure of speech?
An analogy is a figure of speech that creates a comparison by showing how two seemingly different entities are alike, along with illustrating a larger point due to their commonalities. This makes analogy a bit more complex than similar literary devices such as metaphor and simile.