Animal Kingdom MCQ

Ans. a. Mollusca

Explanation: Phylum Mollusca includes a group of animals that have limbs and a less segmented body. They have a well-developed organ system. Cuttlefish or cuttles are marine Molluscs of the Mollusca Phylum, Class Cephalopoda, Subclass Coleoids, Order Sepiida, and Kingdom Animalia.

Ans. c. Nematoda

Explanation: Phylum Nematoda includes roundworms that have a cylindrical body and a false body cavity. They have a pseudo-coelom, which is a false body cavity. Therefore, the true coelom is absent in them. They are bilaterally symmetrical. For example, Wuchereria and Ascarsis.

Ans. c. To reproduce eggs

Explanation: The female mosquito needs blood to produce eggs. Her mouth pierces the skin and sucks the blood out. Then her saliva lubricates the opening which when combined with the injury produces the stinging feeling. 

Ans. a) 5

Explanation: Whittaker classified organisms into five broad kingdoms which are as follows:

• Monera
• Fungi
• Plantae
• Protista
• Animalia

These groups are created on the basis of their source of nutrition, cell structure, and body organization.

Ans. c. Arthropoda

Explanation: Phylum Arthropoda includes animals with joint legs or appendages. They have an open circulatory system.

Ans. b. Penguin

Explanation: Penguin is a vertebrate and is known to belong to the Phylum Chordata. This includes bilaterally symmetrical organisms with a nerve cord and a closed type circulatory system. It has Urochordata, Vertebrata, and Cephalochordata as its sub-phyla.

Phylum Reptiles on the other hand are vertebrates that breathe air and are covered in special skin formed of scales or a bony plate, or a combination of both.

Ans. d. Coelenterata and Echinodermata

Explanation: Phylum Coelenterata has organisms with a hollow body cavity and includes all the aquatic animals. They live solitarily as well as in colonies. They have radial symmetry.

Phylum Echinodermata also includes animals with radial symmetry, having true coelom, and spiny skin.

Ans. d) Spicules

Explanation: Phylum Porifera has organisms with holes that have a harder skeleton and a porous body. The skeleton of these organisms has separate spicules which are microscopic crystalline structures that help in maintaining form and rigidity.

Ans. c) Platyhelminthes

Explanation: Platyhelminthes organisms are known as flatworms. They have a dorsoventrally flattened body with bilateral symmetry. A flame cell is a special kind of excretory cell that is found in Platyhelminthes organisms including flatworms. They act as a kidney to remove the waste material from the body.

Ans. a) Annelida

Explanation: Organisms of Phylum Annelida are ringed worms that have a segmented cylindrical body. They have a body cavity and are bilaterally symmetrical. For example, earthworm and leech.

Ans. b. Hemichordata

Explanation: Phylum hemichordata includes animals that are fragile and soft. They have a single-layered epidermis and have an organ system organization level. Having an open circulatory system, they respire or breathe through their gills as they are marine creatures. External fertilization is seen in these organisms as they have separate sexes. They observe a direct development.

Ans. c) Metamerism

Explanation: Metamerism refers to the characteristic where the body of an organism is externally divided into various segments wherein at least some organs are repeated. For instance, in earthworms, their body observes a pattern known as metameric segmentation, and this phenomenon is referred to as metamerism. It is observed in three animal phyla: Chordata, Arthropoda, and Annelida

Ans. c. Absence of both metamerism and true coelom

Explanation: Ascarsis belong to Aschelminthes Phylum. A true coelom is absent in it as it possesses a pseudo-coelom. Its body is also not metamerically segmented. Therefore, it lacks both metamerism and a true coelom.

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