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CBSE Questions for Class 11 Medical Biology Animal Kingdom Quiz 19 - MCQExams.com
CBSE
Class 11 Medical Biology
Animal Kingdom
Quiz 19
Birds are glorified reptiles that have evolved along dinosaur line. Which group of living reptiles is most closely related to birds?
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0%
Pteranodon
0%
Tautaras
0%
Crocodiles
0%
Turtles
Explanation
Crocodiles
are the
closest
living relatives of the
birds
, sharing a common ancestor that lived around 240 million years ago and also gave rise to the dinosaurs.
Crocodiles
and
birds
are both members of the same clade called archosaurs.
So the correct answer is option C.
Select the correct option for Reptilia.
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0%
$$4$$ chambered heart- Chelone
0%
Tympanum represents ear - Crocodile
0%
External ear present - Ophiosaurus
0%
Dry and scaly skin - Salamandra
Explanation
The tympanum is an external hearing structure present in animals like birds, some reptiles, frogs, crocodiles, etc.
Chelone is a genus of four species of perennial herbaceous plants.
Ophiosaurus is a genus of snake-like lizards that have external ear opening.
Salamandra has moist and porous skin.
Thus, the correct answer is (B).
Select the incorrect matching:
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0%
Annelida - Nereis, Hirudinaira, Lumbricus
0%
Echinodermata - Echinus, Cucumaria, Asterias
0%
Reptilia- Hemidactylus, Ophiosaurus, Chelone
0%
Mammalia- Betta, Rattus, Felis
Explanation
Felis is a genus of small and medium-sized cat species that belong to mammals. Rattus includes all rat species and also belong to mammals. Betta includes ray-finned fishes that belong to fish.
Nereis, Hirudinaria, and Lumbricus belong to Annelida.
Echinus, Cucumaria, and Asterias belong to Echinodermata.
Hemidactylus, Ophiosaurus, and Chelone belong to Reptilia.
Thus, the correct answer is option D.
The land reptile which went back into water to evolve into fish like reptiles:
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0%
Around 250mya e.g. Ichthyosaurs.
0%
Around 300mya e.g. Therapsids.
0%
Around 200mya e.g. Ichthyosaurs.
0%
Around 150mya e.g. Therapsids
Explanation
The name itself suggests Ichthyo = fish like , so Ichthyosaurs are fish like reptiles that evolved 200mya.
Their ancestors are land reptiles which went back to water to evolve into fish like reptiles all of which are extinct now.
Hence, t
he correct answer is option C .
Mammals evolved from:
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0%
Therapsids
0%
Sauropsida
0%
Thecodont
0%
Tuataras
Explanation
Mammals are evolved from a group of synapsids called
Therapsids
. Sauropsida includes reptiles and the extinct parareptilia. Thecodont is ancestral to the dinosaurs and other archosaurs. Tuataras are the ancestor of lizards and snakes.
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