What is the meaning for homologous?
having the same or a similar relation; corresponding, as in relative position or structure. corresponding in structure and in origin, but not necessarily in function: The wing of a bird and the foreleg of a horse are homologous. having the same alleles or genes in the same order of arrangement: homologous chromosomes.
What is homologous and example?
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. They are considered homologous structures because they have a similar underlying anatomy.
What is homology in simple words?
The similarity of a structure or function of parts of different origins based on their descent from a common evolutionary ancestor is homology. Analogy, by contrast, is a functional similarity of structure that is based on mere similarity of use.
What is meant by homologous trait?
A homologous trait is any characteristic which is derived by evolution from a common ancestor. This is contrasted to analogous traits: similarities between organisms that were evolved separately. The term existed before 1859, but got its modern meaning after Darwin established the idea of common descent.
What is homologous and analogous?
Homologous structures share a similar embryonic origin; analogous organs have a similar function. For example, the bones in the front flipper of a whale are homologous to the bones in the human arm. The wings of a butterfly and the wings of a bird are analogous but not homologous.
What is meant by homologous series?
A homologous series is a family of hydrocarbons with similar chemical properties who share the same general formula. We will look at three hydrocarbon series: alkanes, alkenes and the cycloalkanes.
What is homologous series of compound?
Homologous series is a series of compounds with similar chemical properties and the same functional group differing from the successive member by −CH2. Example: The homologous series of straight-chain alkanes can be represented by the general formula CnH2n+2
What is the difference between homology and convergent evolution?
The main difference between homology and convergent evolution is that homology is the evolution of the similar structures in species evolved from a recent common ancestor whereas convergent evolution is the independent evolution of similar structures in unrelated organisms.
What is a homology quizlet?
Terms in this set (31) homology. – evidence that life on earth has evolved its diversity through process of descent with modification. -characteristic shared by two species (or taxa) that is similar because of common ancestor.
What are homologous features?
Homologous Features Similar in Origin Different in Function Recent common ancestor May appear in embryonic development and disappear before birth.
What does homologous structure mean?
The definition of a homologous structure is an organ or body part that appears in different animals and is similar in structure and location, but doesn’t necessarily share the same purpose.
What is an example of homologous structure?
Following are some examples of homologous structures. A dolphin’s flipper, bird’s wing, cat’s leg, and the 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. All mollusks have a “foot” that they use to travel.
What are homologous and analogous structures?
Definition. Analogous Structures: Analogous structures are structures of different species with similar functions.