What is polymorphism describe it in Coelenterata?
What is polymorphism describe it in Coelenterata?
The occurrence of more than one type of structurally and functionally different. individuals within a population is called polymorphism. The class Hydrozoa of phylum. Coelenterata includes a large number of colonial species that contain more than one form of. individuals which are called zooids.
Are jellyfish Coelenterates?
Coelenterates (Phylum Coelenterata or Cnidaria) include jellyfish, anemones, corals, and hydras. The phylum is characterized by a gelatinous body, tentacles, and stinging cells called nemadocysts. Most species are found in marine waters, but some occur in brackish or even fresh water.
What are the polymorphism forms of Coelenterata?
Polymorphic
- Some coelenterate have more than three forms called polymorphism.
- In Hydractinia, five polymorphic form or zooids exists- gastrozooids, spiral dactylzooids, tentaculozooids, skeletozooids and gonozooids.
- Gastrozooids: responsible for feeding.
- Spiral dactylzooids: responsible for protection.
What are Coelenterates called cnidarians?
Why are Coelenterates called Cnidarians? Coelenterates are called Cnidarians because they contain specialized cells called cnidoblasts. They possess stinging structures called nematocysts.
What class exhibits polymorphism?
The phenomenon of polymorphism is mainly seen in the class Hydrozoa. Coelenterates have two basic zooids, polyp and medusa. All other types of zooids are modifications of these two types of zooids. Coelenterates are known for their polymorphism and various types of polypoid and medusoied forms are seen in them.
What is polymorphism and types of polymorphism?
Polymorphism is the ability to process objects differently on the basis of their class and data types. There are two types of polymorphism in Java: compile time polymorphism and run time polymorphism in java. This java polymorphism is also referred to as static polymorphisms and dynamic polymorphisms.
What are tentacles in coelenterates?
Tentacles have special structures known as the nematocysts which help in capturing and paralyzing prey. Coelenterates simply wave their tentacles and when a prey comes in contact, the nematocysts inject the toxin that paralyses or kills the prey. Nematocysts are the most distinguishing feature of this phylum.
What are the main characteristics of coelenterates?
Characteristics. All coelenterates are aquatic, mostly marine, animals. The body form is radially symmetrical, diploblastic and does not have a coelom. The body has a single opening, the hypostome, surrounded by sensory tentacles equipped with either nematocysts or colloblasts to capture mostly planktonic prey.
What is polymorphism explain with Hydrozoa as example?
different individuals within a population is called polymorphism. It is one of the. characteristic features of coelenterate, the class Hydrozoa of phylum Coelenterata includes a large number of colonial species that contain more than one form of individuals which are called zooids.
What is polymorphism hydrozoa?
What is polymorphism in obelia?
appearance of the same species in more than one type of individuals which differ in the form and function from one another is known as polymorphism.
What is polymorphism class 11th?
Answer: Polymorphism refers to the existence of two or more forms of individuals within the same animal species. Polymorphism is common in nature; it is related to biodiversity, genetic variation and adaptation; it usually functions to retain variety of form in a population living in a varied environment.
What is polymorphism in Coelenterata?
Polymorphism in Coelenterata The occurrence of more than one type of structurally and functionally different individuals within a population is called polymorphism. The class Hydrozoa of phylum Coelenterata includes a large number of colonial species that contain more than one form of individuals which are called zooids
What do you mean by polymorphism?
The occurrence of more than one type of structurally and functionally different individuals within a population is called polymorphism. The class Hydrozoa of phylum Coelenterata includes a large number of colonial species that contain more than one form of individuals which are called zooids Coelenterates have two basic zooids, polyp and medusa.
Which coelenterates are monomorphic and which are polymorphic?
A few coelenterates, such as Hydra and sea anemone are monomorphic in which only polyp stage is found but other coelenterates exhibit polymorphism.
What are zooids in phylum Coelenterata?
The class Hydrozoa of phylum Coelenterata includes a large number of colonial species that contain more than one form of individuals which are called zooids Coelenterates have two basic zooids, polyp and medusa. All other types of zooids are modifications of these two types of zooids.
