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प्रश्न
What is the most important pre-condition for adaptive radiation?
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उत्तर
Pre-existing variations are the most important pre-condition for adaptive radiation.
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संबंधित प्रश्न
Find out through internet and popular science articles whether animals other than man have self-consciousness.
List 10 modern-day animals and using the internet resources link it to a corresponding ancient fossil. Name both.
Using various resources such as your school library or the internet and discussions with your teacher, trace the evolutionary stages of any one animal say horse.
The earliest fossil form, in the phylogeny of horse, is ______.
Which of the following is an example of link species?
Ancestral amphibians were tetrapods that evolved during:
Viviparity is considered to be more evolved because ______.
Practise drawing various animals and plants.
Match List I with List II.
| List I | List II |
| A. Mesozoic Era | I. Lower invertebrates |
| B. Proterozoic Era | II. Fish & Amphibia |
| C. Cenozoic Era | III. Birds & Reptiles |
| D. Paleozoic Era | IV. Mammals |
Choose the correct answer from the options given below:
When did the first cellular forms of life appear on Earth?
Which of the following early cell types contributed to the development of multicellular organisms?
Approximately how long ago did invertebrates exist in aquatic environments?
When did some fish lineages develop the ability to move onto land?
For approximately how many years did reptiles dominate the Earth?
Which of the following is an example of a reptile that returned to the water about 200 mya?
When did dinosaurs disappear from the Earth?
What characteristic makes Tyrannosaurus rex notable among land reptiles?
