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प्रश्न
Name five varieties of vegetables which have been produced from 'wild cabbage' by the process of artificial selection.
उत्तर
Broccoli, cabbage, cauliflower, kohlrabi and kale are five varieties of vegetables, which have been produced from 'wild cabbage' by the process of artificial selection.
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संबंधित प्रश्न
Will geographical isolation be a major factor in the speciation of an organism that reproduces asexually? Why or why not?
Which of the following represent tall plants and which represent short plants (or dwarf plants)?
(a) Tt
(b) tt
(c) TT
Give reason for your choice (The symbols have their usual meaning).
What do you understand by the term variation?
Select the group which shares the maximum number of common characters.
Define 'speciation'. Explain how speciation occurs.
Will geographical isolation be a major factor in the speciation of a self-pollinating plant species? Give reason for your answer.
What is species and speciation?
The process by which new species develop from the existing species is known as ______
Complete the following chart:
| Animals | Connecting link between | |
| (1) | Balanoglossus | ______ |
| (2) | ______ | Annelida and Arthropoda |
| (3) | Lung fishes | ______ |
| (4) | ______ | Reptiles and mammals |
| (5) | Seymouria | ______ |
| (6) | Fishes and Amphibia |
Arrange the major events as per geological time scale:
(Origin of conifers, Abundance of trilobites, Diversification of fishes, All types of marine algae, Formation of Forests, Rise of dinosaurs, Extinction of seed ferns, Rise of modern insects.)
| Geological time period |
Major events | |
| 1. | Cambrian | ______ |
| 2. | Devonian | ______ |
| 3. | Permian | ______ |
| 4. | Triassic | ______ |
