Advertisements
Advertisements
Question
List four factors responsible for speciation.
Solution 1
Following are the factors responsible for speciation:-
1. Genetic drift
2. Natural selection
3. Reproductive isolation
4. Geographical isolation
Solution 2
The factors which could lead to speciation are
1. The geographical isolation of population caused by various types of barriers such as mountain ranges, rivers, and seas. This leads to reproductive isolation because of which there is no flow of genes between separated groups of the population.
2. Genetic drift caused by drastic changes in the frequencies of particular genes by chance alone.
3. Variations caused in individuals because of natural selection.
APPEARS IN
RELATED QUESTIONS
Struggle between cow and cow to get grass is called ______.
State one advantage of variation to a species.
How does the creation of variation in a species ensure its survival
A plant has two varieties, one with red petals and the other with white petals. When these two varieties are cross-pollinated, all the offsprings have red petals?
(a) Which gene is dominant?
(b) Choose suitable letters to represent the two genes.
Name the scientist who gave the theory of evolution.
With the help of an example, explain how variation leads to evolution.
What is species and speciation?
Add a note on allopatric speciation.
Add a note on sympatric speciation.
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 | ______ |
