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Statement I: All metatherians are placental mammals.
Statement II: All placental mammals have a menstrual cycle.
(a)Statement A is true and statement B is false
(b)Statement B is true and statement A is false
(c)Both the statements A and B are true
(d)Both the statements A and B are false

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Important Questions on Animal Kingdom
MEDIUM

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HARD
Match the following columns and select the correct option:-
Column-I | Column-II | ||
(a) | Aptenodytes | (i) | Flying fox |
(b) | Pteropus | (ii) | Angel fish |
(c) | Pterophyllum | (iii) | Lamprey |
(d) | Petromyzon | (iv) | Penguin |

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MEDIUM
Name the classes of Tetrapoda that exhibit the following characters:
Column (A) | Column (B) |
Acrodont | Thecodont |
pairs cranial nerves | pairs cranial nerves |
Cold-blooded | Warm-blooded |
Amphicoelous vertebrae | Amphiplatyan vertebrae |

MEDIUM
a) Chondrichthyes have gill slits covered by operculum and Osteichthyes have gill slits without operculum
b) Chondrichthyes have a swim bladder and Osteichthyes do not have a swim bladder
c) Chondrichthyes contain placoid scales and Osteichthyes contain cycloid scales
d) Chondrichthyes contain terminal mouth and Osteichthyes contain ventral mouth

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