Practice MCQs, Assertion–Reason, Match List and Fill in the Blanks from NCERT Class XI Animal Kingdom — answers & concise explanations.
Animal Kingdom - Class-XI: Practice ( MCQs, Assertion-Reason, Match List-I with List-II and Fill in the Blanks) for CBSE and NEET preparation 2026.
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Q371.
The exoskeleton of Arthropods is chemically composed of?
[Animal-Kingdom] [class-xi]
Calcium carbonate
Silica
Chitin
Bone
Correct Option: C [ Chitin ]
Remark: Arthropods are characterized by a tough, protective outer covering called an exoskeleton. This exoskeleton is made of a complex sugar polymer called chitin.
Q372.
Which Phylum is the largest in the Animal Kingdom?
[Animal-Kingdom] [class-xi]
Mollusca
Arthropoda
Chordata
Annelida
Correct Option: B [ Arthropoda ]
Remark: Arthropoda is the largest Phylum in the Animal Kingdom, comprising over two-thirds of all named species on Earth, including insects, arachnids, and crustaceans.
Q373.
Which is the second largest Phylum in the Animal Kingdom?
[Animal-Kingdom] [class-xi]
Arthropoda
Annelida
Mollusca
Echinodermata
Correct Option: C [ Mollusca ]
Remark: Mollusca is the second largest Phylum after Arthropoda, encompassing a diverse group of animals including snails, clams, and octopuses.
Q374.
The Tapeworm belongs to which Phylum?
[Animal-Kingdom] [class-xi]
Aschelminthes
Annelida
Platyhelminthes
Mollusca
Correct Option: C [ Platyhelminthes ]
Remark: Tapeworms are flat, parasitic worms that belong to the Phylum Platyhelminthes (flatworms). They are known for their dorso-ventrally flattened bodies.
Q375.
What is the scientific name for the Tapeworm?
[Animal-Kingdom] [class-xi]
Ascaris
Fasciola
Taenia
Nereis
Correct Option: C [ Taenia ]
Remark: The scientific name for the common Tapeworm is Taenia (e.g., Taenia solium). Ascaris is a roundworm, and Fasciola is a liver fluke.
Q376.
What type of segmentation is observed in Taenia (Tapeworm)?
[Animal-Kingdom] [class-xi]
True metamerism
Pseudosegmentation
No segmentation
External only
Correct Option: B [ Pseudosegmentation ]
Remark: Tapeworms exhibit pseudosegmentation or false segmentation. Unlike the true metamerism seen in Annelids, the segments (proglottids) in tapeworms are not structurally equivalent and are formed differently.
Q377.
Silver fish belongs to which Phylum?
[Animal-Kingdom] [class-xi]
Chordata
Mollusca
Arthropoda
Echinodermata
Correct Option: C [ Arthropoda ]
Remark: Despite its name, Silver fish is not a fish but a wingless insect. Therefore, it belongs to the Phylum Arthropoda.
Q378.
A common feature shared by Silver fish, Scorpion, Dragonfly, and Prawn is?
[Animal-Kingdom] [class-xi]
Book lungs
Jointed appendages
Three chambered heart
Metamorphosis
Correct Option: B [ Jointed appendages ]
Remark: All these animals belong to the Phylum Arthropoda. The defining characteristic shared by all arthropods is the presence of jointed appendages.
Q379.
Ornithorhynchus (Platypus) is a unique mammal because it is?
[Animal-Kingdom] [class-xi]
Viviparous
Oviparous
Flightless
Aquatic only
Correct Option: B [ Oviparous ]
Remark: Ornithorhynchus, commonly known as the Platypus, is an exception among mammals because it is oviparous, meaning it lays eggs instead of giving birth to live young.
Q380.
How many chambers does the heart of a Garden Lizard have?
[Animal-Kingdom] [class-xi]
Two
Three
Four
One
Correct Option: B [ Three ]
Remark: Reptiles, such as the Garden Lizard, typically have a three-chambered heart consisting of two auricles and one partially divided ventricle.
