What is metamerism and give example?

Metamers are the isomers having the same molecular formula but different alkyl groups on two sides of functional groups. This phenomenon of isomerism is called metamerism. Example diethyl ether and methyl propyl ethers are metamers. Usually, molecules having divalent oxygen atoms or Sulphur atoms show metamerism.

What is metamerism answer?

Definition of metamerism 1 : the condition of having or the stage of evolutionary development characterized by a body made up of metameres The basic principle of arthropod design is metamerism, the construction of the body from an extended series of repeated segments.—

What is metamerism class 11 biology?

Answer: (b) Metamerism is the division of animal body, externally and internally into segments with a serial repetition of at least some organism, e.g., annelids (earthworm). However, Segmentation refers to the division of animal’s body into a series of repetitive segments.

Which animal has true metamerism?

True Metamerism: It occurs in annelids (Fig. 17.14), arthropods and in most chordates. The body of annelids consists of a number of segments and the number remains constant in a particular species except in certain cases of asexual reproduction.

What is metamerism example class 11?

Metamers are the isomers having the same molecular formula but different alkyl groups on two sides of functional groups. This phenomenon of isomerism is called metamerism. You can give an example of diethyl ether and methyl propyl ether.

What is Metamerisation in biology?

In biology, metamerism is the phenomenon of having a linear series of body segments fundamentally similar in structure, though not all such structures are entirely alike in any single life form because some of them perform special functions. In animals, metameric segments are referred to as somites or metameres.

What is metameric segmentation class 11?

> Metamerism segmentation: The repetition of organs and tissues at intervals along the body of an animal, which divides the body into a linear series of similar parts or segments (metameres). It is most commonly seen in phylum Annelida and phylum Arthropoda. >

What is metameric segmentation in zoology?

metameric segmentation The repetition of organs and tissues at intervals along the body of an animal, thus dividing the body into a linear series of similar parts or segments (metameres). It is most strikingly seen in Annelida.

What is metamerism in animal kingdom?

Which of the following are examples of metamerism?

Phenetole and benzyl methyl ether.

What is metamerism Class 12?

Solution 2 Metamerism (positional isomerism): Ethers having same molecular formula but different alkyl groups attached on either side of the oxygen atom are called metamers of each other. This phenomenon is called metamerism (positional isomerism).

What is metamerism in arthropods?

Metamerism of arthropods is apparent externally. The arthropod body is composed of a similar segments. Each segment bears a pair of appendages. Similarly most organ systems are not metamerically arranged. Different zoologists give different reasons for the loss of internal metamerism.

What is the meaning of the name metamerism?

Meaning of Metamerism: Metameric segmentation or metamerism is an architectural body plan in some animals in which the similar body segments and organ systems are serially repeated one after another. The similar body segments are called metameres or somites. The animals which exhibit such features called metamerically segmented.

What is the significance of metameric segmentation in animals?

Significance. Metameric segmentation or metamerism is an architectural body plan in some animals in which the similar body segments and organ systems are serially repeated one after another. The similar body segments are called metameres or somites. The animals which exhibit such features called metamerically segmented.

What is metamerism in earthworms?

Metamerism is a body type exhibited by members of the phylum Annelida. It means that the body is composed of repeating segments attached to make a whole. These segments are known as metameres, and the lines we see externally separating each segment are called annuli. Metamerism is easily visible in earthworms.