What is polymorphism in Siphonophora?
Cnidarians ,especially the members of order siphonophora and chondrophora exhibit polymorphism. Polymorphism means different individuals varying in structure and function form a colony which exists as a whole animal. The different forms are called zooids. Zooids can be polypoid or medusoid.
What is the polymorphism in cnidarians?
Polymorphism refers to the occurrence of structurally and functionally more than two different types of individuals within the same organism. It is a characteristic feature of Cnidarians, particularly the polyp and medusa forms, or of zooids within colonial organisms like those in Hydrozoa.
What is polymorphism in phylum Coelenterata?
Polymorphism is the existence of multiple types of structurally and functionally diverse individuals within a population. The phylum Coelenterata’s class Hydrozoa contains a huge number of colonial species with several forms of individuals known as zooids.
Does Halistemma exhibit polymorphism?
Highly modified polymorphism: In order Siphonophora, such as Diphyes, Halistemmia, Stephalia and Physalia, zooids are so much modified that they appear like organs of a single Page 2 body rather than individuals of a colony. They are mostly pelagic in habit.
What do you understand by polymorphism?
Definition of polymorphism : the quality or state of existing in or assuming different forms: such as. a(1) : existence of a species in several forms independent of the variations of sex. (2) : existence of a gene in several allelic forms also : a variation in a specific DNA sequence.
What is polymorphism in zoology?
polymorphism, in biology, a discontinuous genetic variation resulting in the occurrence of several different forms or types of individuals among the members of a single species. A discontinuous genetic variation divides the individuals of a population into two or more sharply distinct forms.
Why does polymorphism occur?
According to the theory of evolution, polymorphism results from evolutionary processes, as does any aspect of a species. It is heritable and is modified by natural selection.
What is polymorphism and its significance?
Polymorphism may be defined as the “phenomenon of existence of different physiological and morphological forms represented by an extensive range of variation within a single species”.
Which phylum is polymorphism?
phylum cnidaria
Polymorphism refers to the phenomenon of attribution of different functions to different individuals of a form. It is a characteristic feature of class hydrozoa of phylum cnidaria which exhibits alternation of sexual and asexual stages.
Does anthozoa show polymorphism?
(a)Anthozoa.
What is polymorphism simple?
In object-oriented programming, polymorphism (from the Greek meaning “having multiple forms”) is the characteristic of being able to assign a different meaning or usage to something in different contexts – specifically, to allow an entity such as a variable, a function, or an object to have more than one form.
Which animals show polymorphism?
Different types of polymorphism have been identified and are listed separately….Contents
- 6.1 Ants.
- 6.2 Chromosome polymorphism in Drosophila.
- 6.3 Hoverfly polymorphism.
- 6.4 Peppered moth.
- 6.5 Two-spotted ladybird beetle.
- 6.6 Scarlet tiger moth.
Does Scyphozoa show polymorphism?
Only Hydrozoa and Scyphozoa show polymorphic forms in their life cycle ( i.e they exist in two forms: polyp and medusa).