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Question
What is the most important pre-condition for adaptive radiation?
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Solution
Pre-existing variations are the most important pre-condition for adaptive radiation.
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RELATED QUESTIONS
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 ______.
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:
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?
Which of the following is an adaptation that allowed amphibians to survive in both aquatic and terrestrial conditions?
What major survival advantage did thick-shelled eggs provide to reptiles?
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?
What possible explanation is given for the sudden extinction of dinosaurs?
How did the extinction of dinosaurs affect the evolution of mammals?
What happened to South American mammals over evolutionary time?
What characteristic makes Tyrannosaurus rex notable among land reptiles?
