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#11 | Embryological Evidences of Evolution
(Zoology (2021)) > Evolution

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Presence of gills in the tadpole of frog indicates that

1. fishes were amphibian in the past

2. fishes evolved from frog-like ancestors

3. frogs will have gills in future

4. frogs evolved from gilled ancestors

 71%
Level 2: 60%+
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Which one of the following describes correctly the homologous structures?

1. Organs appearing only in embryonic stage and disappearing later in the adult
2. Organs with anatomical similarities, but performing different functions
3. Organs with anatomical dissimilarities, but performing same functions
4. Organs that have no function now, but had an important function in ancestors
 90%
Level 1: 80%+
Hints

The early-stage human embryo distinctly possesses

1. gills                             

2. gill slits

3. external ear (pinna)       

4. eyebrows                             

 85%
Level 1: 80%+
AIIMS - 2003
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Potato and sweet potato 

1. have edible parts which are homologous organs
2. have edible parts which are analogous organs
3. have been introduced in India from the same place
4. are two species of the same genus.
 87%
Level 1: 80%+
AIIMS - 2004
Hints

Wings of pigeon, mosquito and bat show

1. divergent evolution 

2. atavism

3. convergent evolution 

4. all of these 

 84%
Level 1: 80%+
AIIMS - 2007
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