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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
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 ______.
Ancestral amphibians were tetrapods that evolved during:
When we talk of functional macromolecules (e.g. proteins as enzymes, hormones, receptors, antibodies etc), towards what are they evolving?
Two organisms occupying a particular geographical area (say desert) show similar adaptive strategies. Taking examples, describe the phenomenon.
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?
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?
When did dinosaurs disappear from the Earth?
What possible explanation is given for the sudden extinction of dinosaurs?
