Describe Mollusa................
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Molluscans are very diverse animals and form an important part of the ecosystem in the world. Some animals that you are familiar with like snails, octopuses, squids, oysters, clams etc. all belong to Phylum Mollusca. Did you know that Molluscs with shells can produce pearls? Some of these are also eaten by humans in different regions of the world. Let us educate ourselves about this phylum of the Animal Kingdom.
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That should be "Mollusca".
The answer is in following:=>
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Mollusca is the 2nd largest phylum of invertebrate animals. The members are known as Molluscs or Mollusks. Around 85000 extant species of molluscs are recognized. The number of fossil species is estimated between 60000 and 100000 additional species.
Kingdom : Animalia
Superphylum : Lophotrochozoa
Phylum : Mollusca
Molluscs are the largest marine Phylum., comprising about 23% of all the named marine organisms. Numerous molluscs also live in fresh water and terristial habitats. They are highly diverse , not just in size and in anatomical structure, but also in behavior and in habitat. The Phylum is divided into 8 or 9 taxonomic classes, of which two are entirely extinct. Cephalopod molluscs , such as squid, cuttlefish, and octopus. are among the most neurologically advanced of all invertebrates-and either the giant squid and the colossal squid is the largest known invertebrate species. The gastropods are by far the most numerous molluscs and account for 80% of the total classified species.
Some characteristics :->
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1. The dorsal part of the body wall is a mantle which secretes calcareous spicules, plats or shells. It overlaps the body with enough spare room to form a mantel cavity.
2. The anus and genitals open into the mantle cavity.
3. There are two pairs of main nerve chords.
4. Unsegmented soft body with bilateral symmetry.
5. Presence of an internal and external shells.
6. A toothed tongue called the radula.
7. Muscular foot.
Examples : =>
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Bivalvia, Squid, Gastropods, Octopus, Cephalopod, Cuttelfish, Gastropoda etc.
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I hope it will help you. Thank you.
==============================
That should be "Mollusca".
The answer is in following:=>
=●=●=●=●=●=●=●=●=●=●=●=●=●=●=
Mollusca is the 2nd largest phylum of invertebrate animals. The members are known as Molluscs or Mollusks. Around 85000 extant species of molluscs are recognized. The number of fossil species is estimated between 60000 and 100000 additional species.
Kingdom : Animalia
Superphylum : Lophotrochozoa
Phylum : Mollusca
Molluscs are the largest marine Phylum., comprising about 23% of all the named marine organisms. Numerous molluscs also live in fresh water and terristial habitats. They are highly diverse , not just in size and in anatomical structure, but also in behavior and in habitat. The Phylum is divided into 8 or 9 taxonomic classes, of which two are entirely extinct. Cephalopod molluscs , such as squid, cuttlefish, and octopus. are among the most neurologically advanced of all invertebrates-and either the giant squid and the colossal squid is the largest known invertebrate species. The gastropods are by far the most numerous molluscs and account for 80% of the total classified species.
Some characteristics :->
********************************
1. The dorsal part of the body wall is a mantle which secretes calcareous spicules, plats or shells. It overlaps the body with enough spare room to form a mantel cavity.
2. The anus and genitals open into the mantle cavity.
3. There are two pairs of main nerve chords.
4. Unsegmented soft body with bilateral symmetry.
5. Presence of an internal and external shells.
6. A toothed tongue called the radula.
7. Muscular foot.
Examples : =>
****************
Bivalvia, Squid, Gastropods, Octopus, Cephalopod, Cuttelfish, Gastropoda etc.
-----------------------◆●◆----------------------
I hope it will help you. Thank you.
==============================
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