Mollusca is the second-largest phylum after phylum arthropoda of invertebrate animals. The members are known as molluscs or mollusks. Around 85,000 extant species of molluscs are recognized.
Which is the 2nd largest phylum?
Mollusca is the second largest Phylum in the Animal Kingdom.
Which is the largest and second largest phylum among Kingdom Animalia?
ANSWER: The second largest phylum of kingdom animalia is Mollusca.
Which is the second largest phylum of invertebrates?
The Nematoda or roundworms, are perhaps the second largest animal phylum, and are also invertebrates. Roundworms are typically microscopic, and occur in nearly every environment where there is water. A number are important parasites. Smaller phyla related to them are the Kinorhyncha, Priapulida, and Loricifera.
Is phylum Mollusca the largest second largest or third largest phylum in the world?
Introduction. The vast majority of animal diversity (∼99%) is comprised of invertebrates, and members of the phylum Mollusca are the second largest phylum with up to 110 000 living species, most of which are marine.
Which is the largest class in animal kingdom?
The biggest class of animal kingdom is? Answer: Insecta is a class of invertebrates. They are placed within the phylum Arthropoda. The characteristics of group Insecta are that they have six legs or three pairs of legs.
What is the smallest phylum?
Placozoa is the smallest phylum in the animal kingdon with only one identified species.
Is second largest phylum in Animal Kingdom a Mollusca B Arthropoda C porifera D platyhelminthes?
Complete answer:
There are 10 distinct phylum in animal kingdom, and they are porifera, Coelenterata, Ctenophora, Platyhelminthes, Aschelminthes, Annelida, Arthropoda, Mollusca, Echinodermata, Hemichordate, Chordata. The largest animal kingdom is Arthropoda and Mollusca comes second.
What phylum is the body segmented?
Phylum Annelida includes vermiform, segmented animals. Segmentation is seen in internal anatomy as well, which is called metamerism. Annelids are protostomes. These animals have well-developed neuronal and digestive systems.
Which one of the following belongs to Mollusca?
The animals belonging to the phylum Mollusca are apple snail, pearl oyster, devil fish, tusk shell, etc. Hence correct answer is option A.
What type of skeleton is present in arthropods?
Arthropod and vertebrate skeletons are quite distinct from each other. Basically, the vertebrate skeleton is internal (an endoskeleton) while the arthropod skeleton is external (an exoskeleton). Here, both kinds will be referred to as skeletons.
What is true Mollusca?
Mollusca have bilateral symmetry and they have CaCO3 (calcareous) shell.
What is visceral mass?
visceral mass: the soft, non-muscular metabolic region of the mollusc that contains the body organs. mantle: the body wall of a mollusc, from which the shell is secreted.
Which phylum contains the greatest number of species of animals?
The arthropod phylum includes all insects, spiders and millipedes, as well as crustaceans and sea spiders. The long-extinct trilobites were also arthropods. Arthropoda is currently the largest phylum, with well over a million species.