Mollusca is the second largest Phylum in the Animal Kingdom. Molluscs are both terrestrial and aquatic (marine or freshwater).
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.
What is the smallest phylum?
Placozoa is the smallest phylum in the animal kingdon with only one identified species.
Which is the second largest group of animals?
Mollusca is the second largest phylum in animal kingdom.
- They are bilaterally symmetrical.
- They are triploblastic, with three layers.
- They show organ system grade of organisation.
- The body is soft and unsegmented.
- Body is covered by a mantle and shell.
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.
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.
Which is the largest phylum?
Arthropod, (phylum Arthropoda), any member of the phylum Arthropoda, the largest phylum in the animal kingdom, which includes such familiar forms as lobsters, crabs, spiders, mites, insects, centipedes, and millipedes. About 84 percent of all known species of animals are members of this phylum.
Which is the third largest phylum?
Phylum chordata is the third largest phylum in the animal kingdom.
How many classes can be grouped as chordates?
The Chordata Phylum and its Five Classes – The Classy Classification of Classy Organisms.
What does the word phylum mean?
1a : a direct line of descent within a group. b : a group that constitutes or has the unity of a phylum specifically : a primary category in biological taxonomy especially of animals that ranks above the class and below the kingdom — compare division sense 10.
What is the largest animal group on Earth?
Largest arthropod
Arthropods (spiders, insects and other invertebrates with hard exteriors) make up the largest animal group on Earth, but only one arthropod species can claim the title of largest by size: the Japanese spider crab (Macrocheira kaempferi).
What is the biggest animal family?
In terms of numbers of species, insects certainly represent the largest percentage of the world’s organisms. There are more than 1 million species of insects that have been documented and studied by scientists.
Which class is the largest number of animals?
The insects or class Insecta comprise the largest number of animals in the world. The total number of insect species is estimated at around 6 to 10 million and comprises over 90% of the animal life forms on Earth.
Which is the largest and second largest phylum among Kingdom Animalia?
ANSWER: The second largest phylum of kingdom animalia is Mollusca.
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.
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.