Half life of which radioactive isotope is \(1.3 \times10^9\) years?
1. Carbon14
2. Carbon12
3. Uranium238
4. Potassium40
Subtopic: Â Palentological Evidences of Evolution |
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Which of the following is not an example of homologous organ?
1. Vertebrate hearts or brains
2. Thomas of Bougainvillea and tendrils of Cucurbita
3. Leg of cheetah, and flipper of whale
4. Eye of Octopus and of mammals
1. Vertebrate hearts or brains
2. Thomas of Bougainvillea and tendrils of Cucurbita
3. Leg of cheetah, and flipper of whale
4. Eye of Octopus and of mammals
Subtopic: Â Concept of Organic Evolution: Evidence |
 74%
From NCERT
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Darwin's finches are example of
1. Biogeographical evidences
2. Paleontological evidences
3. Embryological evidences
4. Analogous organs
1. Biogeographical evidences
2. Paleontological evidences
3. Embryological evidences
4. Analogous organs
Subtopic: Â Darwin's Theory |Â Summary of Darwin's Theory |
 82%
From NCERT
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What are the anatomical structures called that share a common ancestry?
1. Analogous structures
2. Homologous structures
3. Evolutionary structures
4. Vestigial structures
1. Analogous structures
2. Homologous structures
3. Evolutionary structures
4. Vestigial structures
Subtopic: Â Concept of Organic Evolution: Evidence |
 86%
From NCERT
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Tendrils in different plants such as Pisum and Passiflora are example of
1. Analogous organs
2. Divergent evolution
3. Homologous organs
4. Both (1) and (2)
1. Analogous organs
2. Divergent evolution
3. Homologous organs
4. Both (1) and (2)
Subtopic: Â Concept of Organic Evolution: Evidence |
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Which of the following structures are vestigial in Python but not in humans?
1. Nictitating membrane
2. Ear pinna
3. Hind limbs
4. All of these
1. Nictitating membrane
2. Ear pinna
3. Hind limbs
4. All of these
Subtopic: Â Concept of Organic Evolution: Evidence |
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Which of the following is not a connecting link?
1. Neophilina
2. Peripatus
3. Latimeria
4. Limulus
1. Neophilina
2. Peripatus
3. Latimeria
4. Limulus
Subtopic: Â Concept of Organic Evolution: Evidence |
 54%
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Subtopic: Â Sources of Variation |
 70%
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Ontogeny is defined as
1. Development of embryos
2. Ancestral history of an organism
3. Occurence of ancestral traits in an embryo
4. Presence of rudimentary organs in an organism
1. Development of embryos
2. Ancestral history of an organism
3. Occurence of ancestral traits in an embryo
4. Presence of rudimentary organs in an organism
Subtopic: Â A BRIEF ACCOUNT OF EVOLUTION |
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Complete the analogy
Desert of America : Cacti :: Deserts of Africa : _____________
1. Marsupials
2. Double coconut
3. Finches
4. Euphorbias
Desert of America : Cacti :: Deserts of Africa : _____________
1. Marsupials
2. Double coconut
3. Finches
4. Euphorbias
Subtopic: Â Concept of Organic Evolution: Evidence |
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