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प्रश्न
Two organisms occupying a particular geographical area (say desert) show similar adaptive strategies. Taking examples, describe the phenomenon.
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उत्तर
One can say that it is the similar habitat that has resulted in selection of similar adaptive features in different groups of organisms but toward the same function. Spins of Opuntia and cactus are modifications of leaves to prevent the loss of water in desert.
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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.
Which of the following is an example of link species?
Viviparity is considered to be more evolved because ______.
What is the most important pre-condition for adaptive radiation?
When we talk of functional macromolecules (e.g. proteins as enzymes, hormones, receptors, antibodies etc), towards what are they evolving?
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:
Which of the following early cell types contributed to the development of multicellular organisms?
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?
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 possible explanation is given for the sudden extinction of dinosaurs?
Which of the following best describes early mammals?
