Question

In the members of class Scyphozoa,
(a) Polyp stage is well developed.
(b) Polyp stage is reduced.
(c) Medusa stage is absent.
(d) Medusa stage is reduced.

Answer 1

Hint: The class Scyphozoa belongs to the phylum Cnidaria. The Cnidarians exhibit two distinct morphological body plans namely polyp and medusa. At the adult stage, the polyps are sessile whereas the medusa is mobile. But in the class Scyphozoa, the sessile stage is decreased.

Complete answer:
In the members of class Scyphozoa, the polyp stage is reduced. Class Scyphozoa is one of the classes inside the phylum Cnidaria. The class Scyphozoa is alluded to as "genuine jellyfish".
The jellyfish stage is predominant, and the polyp stage might be available, contingent upon the family in the class Scyphozoa.
-The scyphozoan class can be found on the edge of Cnidaria, the edge of "stinging" animals, similar to jellyfish.
-There are around 200 species that have a place with the Scyphozoa class, and they are the most notable coagulated animals in reality. These incorporate ocean brambles, moon jellyfish, and jellyfish.
-The class Scyphozoa presents the primary attributes of cnidarians.
-The sort of evenness they show is outspread balance and they are diploblastic animals.
-The body mass of these species is composed of the external epidermis or ectoderm and inside gastrodermis or endoderm, and they are isolated by the mesoglea.
-They have a nematocyst, which is the quality of the phylum cnidaria wherein this class Scyphozoa has a place with.

So, the correct answer is the ‘Polyp stage is reduced’.

Note:
-Scyphozoa are the exclusive species that are a marine class of the phylum Cnidaria, so they are generally known as genuine jellyfish or true jellyfish.
-The name of the class Scyphozoa came from the Greek word skyphos, which implies a kind of a drinking cup and the creature regularly alludes to the cup state of the living being.
-The polyp may be solitary, as found in the sea anemone, or colonial, as found in coral, and it can be sessile or attached to a surface. In the sessile polyp, a fertilized egg develops that buds asexually and eventually buds off one or more medusae.