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Q91.
Petromyzon (Lamprey) belongs to the class:
[Animal-Kingdom] [class-xi]
Correct option: C [ Cyclostomata ]
Remark: Explanation: Petromyzon (Lamprey) is a jawless, ectoparasitic vertebrate belonging to the Class Cyclostomata.
Q92.
Which of these is a poisonous snake?
[Animal-Kingdom] [class-xi]
Correct option: C [ Naja (Cobra) ]
Remark: Explanation: The sources list Naja (Cobra), Bangarus (Krait), and Vipera (Viper) as examples of poisonous snakes.
Q93.
Pavo is the scientific name for:
[Animal-Kingdom] [class-xi]
Correct option: D [ Peacock ]
Remark: Explanation: Pavo is the scientific name for the Peacock.
Q94.
Which of the following mammals is adapted to fly?
[Animal-Kingdom] [class-xi]
Correct option: C [ Pteropus (Flying fox) ]
Remark: Explanation: The sources list several mammals adapted for different modes of life; Pteropus (Flying fox) is adapted to fly.
Q95.
A closed circulatory system is present in:
[Animal-Kingdom] [class-xi]
Correct option: B [ Annelids and Chordates ]
Remark: Explanation: A closed circulatory system is present in annelids and chordates. Arthropods and most molluscs have an open system.
Q96.
Which phylum exhibits organ level of organisation and is acoelomate?
[Animal-Kingdom] [class-xi]
Correct option: C [ Platyhelminthes ]
Remark: Explanation: Platyhelminthes (flatworms) exhibit an organ level of organisation and are acoelomate, meaning they lack a body cavity.
Q97.
An animal with a segmented body, chitinous exoskeleton, and jointed appendages belongs to which phylum?
[Animal-Kingdom] [class-xi]
Correct option: C [ Arthropoda ]
Remark: Explanation: These are the defining characteristics of Phylum Arthropoda: a segmented body, an exoskeleton made of chitin, and jointed appendages.
Q98.
A soft-bodied animal, usually covered by a calcareous shell, with a muscular foot and visceral hump is a member of:
[Animal-Kingdom] [class-xi]
Correct option: B [ Mollusca ]
Remark: Explanation: These are the key features of Phylum Mollusca: a soft body often covered by a calcareous shell, with divisions including a muscular foot and visceral hump.
Q99.
Which class is characterized by a streamlined body, cartilaginous endoskeleton, and placoid scales?
[Animal-Kingdom] [class-xi]
Correct option: B [ Chondrichthyes ]
Remark: Explanation: Class Chondrichthyes (cartilaginous fishes) is characterized by a streamlined body, a cartilaginous endoskeleton, and minute placoid scales.
Q100.
Animals that are warm-blooded, have feathers, and a four-chambered heart belong to the class:
[Animal-Kingdom] [class-xi]
Correct option: D [ Aves ]
Remark: Explanation: These are the key features of Class Aves (birds): they are warm-blooded (homoiothermous), possess feathers, and have a completely four-chambered heart.