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प्रश्न
Viviparity is considered to be more evolved because ______.
विकल्प
the young ones are left on their own
the young ones are protected by a thick shell
the young ones are protected inside the mother's body and are looked after they are born leading to more chances of survival
the embryo takes a long time to develop
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उत्तर
Viviparity is considered to be more evolved because the young ones are protected inside the mother's body and are looked after they are born leading to more chances of survival.
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संबंधित प्रश्न
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:
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:
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?
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?
Which of the following best describes early mammals?
What happened to South American mammals over evolutionary time?
