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प्रश्न
What is meant by a species?
उत्तर
A species is a population of organisms consisting of similar individuals which can breed together and produce fertile offspring.
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संबंधित प्रश्न
Select the group which shares the maximum number of common characters.
What name is given to the sequence of gradual changes over millions of years in which new species are produced?
Name an animal having rudimentary eyes.
Choose the one term from the following which includes the other three :
broccoli, wild cabbage, cauliflower, cabbage
Define 'speciation'. Explain how speciation occurs.
Define 'natural selection'.
The theory of evolution of species by natural selection was given by ______
One of the following has not been produced from wild cabbage by the process of artificial selection. This one is :
(a) kohlrabi
(b) cabbage
(c) spinach
(d) kale
The theory of evolution of species by natural selection was given by
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 | ______ |
