English

List Any Two Factors that Could Lead to Speciation. - Science

Advertisements
Advertisements

Question

List any two factors that could lead to speciation.

Solution

Natural selection and genetic drift could lead to speciation.

shaalaa.com
  Is there an error in this question or solution?
2012-2013 (March) Delhi Set 2

Video TutorialsVIEW ALL [2]

RELATED QUESTIONS

The palisade cells of a species of plant contain 28 chromosomes. How many chromosomes will there be in each gamete produced by the plant?
(a) 56
(b) 28
(c) 14
(d) 4


Select the group which shares the maximum number of common characters.


Name an animal having rudimentary eyes.


Name the ancestor of the following :
Broccoli, Kohlrabi, Kale


 Name five varieties of vegetables which have been produced from 'wild cabbage' by the process of artificial selection.

 

Which of the following statement is incorrect with respect to variations?
(a) all variations in a species have equal chance of survival
(b) change in genetic composition results in variations
(c) selection of variations by environmental factors forms the basis of evolutionary process
(d) variations are the minimum in asexual reproduction


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


Define speciation according to A.E. Emerson and explain its types giving suitable examples.


In human males, all the chromosomes are paired perfectly except one. These unpaired chromosomes are ______ 

(i) Large chromosome

(ii) Small chromosome

(iii) Y chromosome

(iv) X chromosome


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 ______

Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×