Answers and bookmarks are saved in this browser, across visits. They do not sync to your account.
Q181.
An example of a fish commonly kept in an aquarium is __________.
[Animal-Kingdom] [class-xi]
Correct option: C [ Pterophyllum (Angel fish) ]
Remark: Examples of aquarium fish from the class Osteichthyes include Betta (Fighting fish) and Pterophyllum (Angel fish).
Q182.
The name "Amphibia" signifies that these animals can live in __________.
[Animal-Kingdom] [class-xi]
Correct option: C [ Aquatic as well as terrestrial habitats ]
Remark: The name Amphibia comes from Greek words (Amphi: dual, bios: life), indicating they can live in both aquatic and terrestrial habitats.
Q183.
The heart of an amphibian is __________-chambered (two auricles and one ventricle). __________
[Animal-Kingdom] [class-xi]
Correct option: B [ Three-chambered ]
Remark: The heart in amphibians is three-chambered, consisting of two auricles and one ventricle.
Q184.
The common chamber in amphibians into which the alimentary, urinary, and reproductive tracts open is called the __________.
[Animal-Kingdom] [class-xi]
Correct option: B [ Cloaca ]
Remark: The alimentary canal, urinary tracts, and reproductive tracts of amphibians open into a common chamber called the cloaca, which opens to the exterior.
Q185.
An example of a limbless amphibian is __________.
[Animal-Kingdom] [class-xi]
Correct option: C [ Ichthyophis ]
Remark: Ichthyophis is an example of a limbless amphibian.
Q186.
The class name "Reptilia" refers to their __________.
[Animal-Kingdom] [class-xi]
Correct option: C [ Creeping or crawling mode of locomotion ]
Remark: The class name Reptilia comes from the Latin words repere or reptum, which mean to creep or crawl, referring to their mode of locomotion.
Q187.
The body of a reptile is covered by __________.
[Animal-Kingdom] [class-xi]
Correct option: D [ Dry and cornified skin, epidermal scales or scutes ]
Remark: The body of reptiles is covered by dry and cornified skin, which has epidermal scales or scutes.
Q188.
While most reptiles have a three-chambered heart, which reptile has a four-chambered heart? __________
[Animal-Kingdom] [class-xi]
Correct option: D [ Crocodile ]
Remark: The heart is usually three-chambered in reptiles, but it is four-chambered in crocodiles.
Q189.
Poikilotherms are animals that __________.
[Animal-Kingdom] [class-xi]
Correct option: B [ Lack the capacity to regulate their body temperature ]
Remark: Poikilotherms, or cold-blooded animals, lack the internal capacity to regulate their body temperature, which fluctuates with the environment.
Q190.
The characteristic feature of Aves is the presence of __________.
[Animal-Kingdom] [class-xi]
Correct option: C [ Feathers ]
Remark: The defining characteristic feature of the class Aves (birds) is the presence of feathers.