Question

In which of the following ,the genus name its two characters and its phylum are not correctly matched,whereas the remaining three are correct.

	Genus Name	Two characters	Phylum
a)	Pila	a)Body segmented.b)Mouth with radulla	Mollusca
b)	Asterias	a)Spiny Skinnedb)water vascular system	Echinodermata
c)	Sycon	a)Pore bearingb)Canal system	Porifera
d)	Periplaneta	a)Jointed appendagesb)Chitinous exoskeleton	Arthropoda

A)a
B)b
C)c
D)d

Answer 1

Hint: Taxonomy is called the science of classifying species. Each species discovered so far is divided into five kingdoms, one of which is the Animal Kingdom or the Animal Kingdom. The members of kingdom Animalia are further categorised into different Phyla, Class, Order, Family, and Genus based on certain recognisable characteristic features.

Complete answer:
Mollusca:
1.There are soft-bodies, triploblastic and bilaterally symmetrical and coelomate for the species belonging to the phylum Mollusca. The Mollusca analysis is called Malacology. They are sluggish invertebrates, with visceral organs protected by a thin fleshy envelope or mantle.
2.In the lives of humans, they play a very significant role. As well as jewellery, they are a source of food. Natural pearls are produced within these molluscs.
3.Here are a few examples of species belonging to the Mollusca phylum:
Pila (Apple snail)
Limax (Slug)
Unio (Freshwater mussel)
Turbinella (Shankha)

Echinodermata:
1.There are Echinoderms in the waters of the sea as well as in the intertidal zones. A significant characteristic of the Echinodermata phylum is the aquatic origin of all the species belonging to this phylum. None of the species are aquatic or freshwater.
2.Gaseous exchange, nutrient circulation and waste removal are accounted for by the water vascular system present in echinoderms.
3.They are spherical or elongated and have a star-like look.
4.They are exclusively aquatic animals.
5.There are spiny-skinned species.

Porifera:
1.Around 5000 species are included in this phylum. Poriferans were the first multicellular pore-bearing species. The pores are referred to as Ostia.Poriferans have a texture that is spongy and are often referred to as sponges. They are bound to the substratum and do not move.They have the power to absorb fluids and withhold them.

Arthropoda:
1.With about nine lakh types, Arthropoda is the largest phylum. They can be marine, parasitic or even terrestrial. They have appendages fused together and a chitinous exoskeleton.
2.The body is triploblastic, segmented and symmetrical in a bilateral way.
3.They show the extent of structure of the organ system.
4.There is a division of the body into the head, thorax, and abdomen.
5.Their bodies have jointed appendages that assist with locomotion.

Hence, the correct answer is option (A)

Note: 1.The second-largest phylum is Phylum Mollusca.
2.A few molluscs like Unio have green glands that in vertebrates resemble the liver.
3.To measure the chemical essence of water, they possess osphradia.
4.Statocysts preserve equilibrium in the body.