|
Explain with examples how the following are evidences in favour of evolution in organisms. (i) Homologous organs
|
|
1
|
667
|
April 2, 2019
|
|
Give one example each of character that are inherited and the ones that are acquired in human
|
|
1
|
1829
|
April 2, 2019
|
|
Mention any four details that can be inferred about organisms from their fossils
|
|
1
|
716
|
April 2, 2019
|
|
Name any three organs homologous to human hand. Why are they considered homologous?
|
|
1
|
826
|
April 2, 2019
|
|
How does speciation take place?
|
|
1
|
3227
|
July 16, 2018
|
|
How has the method of ‘artificial selection’ by humans helped in the evolution of different vegetables?
|
|
0
|
6183
|
March 20, 2018
|
|
Explain the ways in which evolutionary relationships can be traced
|
|
0
|
5259
|
March 20, 2018
|
|
What is speciation? List four factors that could lead to speciation
|
|
0
|
11672
|
March 20, 2018
|
|
What are fossils? How are they formed?
|
|
0
|
17841
|
March 20, 2018
|
|
Explain Mendel’s experiment with peas on inheritance of characters considering only one visible contrasting character
|
|
0
|
7597
|
March 20, 2018
|
|
Describe Darwin’s theory of evolution?
|
|
0
|
13607
|
March 20, 2018
|
|
What are the various evidences in favour of evolution?
|
|
0
|
6600
|
March 20, 2018
|
|
How do Mendel’s experiments show that the traits may be dominant or recessive
|
|
0
|
3054
|
March 20, 2018
|
|
In the following crosses write the characteristics of the progeny
|
|
0
|
1517
|
March 20, 2018
|
|
Mention any two points of difference between acquired and inherited traits
|
|
0
|
9102
|
March 20, 2018
|
|
Give the basic features of the mechanism of inheritance.?
|
|
0
|
3424
|
March 20, 2018
|
|
Explain with reason why giraffe has long neck
|
|
0
|
1859
|
March 20, 2018
|
|
Does geographical isolation of individuals of a species lead to formation of a new species? Provide a suitable explanation
|
|
0
|
950
|
March 20, 2018
|
|
List three factors that provide evidences in favour of evolution in organisms and state the role of each in brief
|
|
0
|
4796
|
March 20, 2018
|
|
In a cross between plants with pink flowers and plants with white flowers
|
|
0
|
6224
|
March 20, 2018
|
|
Name two homologous structures in vertebrates. Why are they so called?
|
|
0
|
3125
|
March 19, 2018
|
|
“It is possible that a trait is inherited but may not be expressed.” Give a suitable example to justify this statement
|
|
0
|
17993
|
March 19, 2018
|
|
Name the organism Mendel used for his experiments
|
|
0
|
4598
|
March 19, 2018
|
|
Describe the contribution of Lamarck
|
|
0
|
2428
|
March 19, 2018
|
|
Explain analogous organs and homologous organs
|
|
0
|
943
|
March 19, 2018
|
|
Mention three important features of fossils which help in the study of evolution.?
|
|
0
|
772
|
March 19, 2018
|
|
Planaria, insects, octopus and vertebrates all have eyes
|
|
0
|
1486
|
March 19, 2018
|
|
“Fossils are related to evolution”, justify this statement. Give the two ways by which age of the fossils can be estimated?
|
|
0
|
3046
|
March 19, 2018
|
|
. Explain the following:Speciation Natural Selection
|
|
0
|
1400
|
March 19, 2018
|
|
"Two areas of study namely ‘evolution’ and ‘classification’ are interlinked”. Justify this statement
|
|
0
|
9292
|
March 19, 2018
|