Question

Pickup the mismatched
A. Annelida- Hydra
B. Nemathelminthes- Ascaris
C. Arthropoda- cockroach
D. Echinodermata- starfish

Answer 1

Hint: A phylum is a level of classification or taxonomic rank in biology that falls between kingdom and class. Although the International Code of Nomenclature for algae, fungi, and plants considers the terminology as comparable, the term division has traditionally been used in botany instead of phylum.
The various phylum of the animal kingdom is: Porifera, Coelenterata (Cnidaria), Platyhelminthes, Nematoda, Annelida, Arthropoda, Mollusca, Echinodermata, Hemichordata, Chordata.

Complete answer:
Option A: Ascaris is a type of roundworm that belongs to the Aschelminthes phylum. Cockroaches belong to the Arthropoda phylum. An Echinoderm is a type of starfish. Option A indicates that Hydra is a Cnidarian or Coelenterate animal, not an Annelida animal.
So, option A is correct.
Option B: Ascaris is a type of roundworm belonging to the phylum Aschelminthes.
So, option B is not correct.
Option C: cockroaches are a member of phylum arthropoda
So, option C is not correct.
Option D: fishes are considered under the phylum echinodermata, hence starfish is also an echinoderm
So, option D is not correct.

Therefore, Option A is the correct answer.

Note:
The kingdom Animalia contains the phylum Annelida, which is a fairly wide phylum. Annelids can be found in both aquatic and terrestrial habitats. These are invertebrate species that are bilaterally symmetrical. Their segmented bodies set them apart from other organisms.
Following is the different classification of Annelida:
Polychaeta
Oligochaeta
Hirudinea
Archiannelida
Characteristics of annelida:
Annelids are triploblastic and coelomate.
They are organised at the organ system level.
Their bodies are divided into sections.
They breathe via the surface of their bodies.
The excretory organs are known as nephridia.
Their circulatory and digestive systems are well-developed.