|
Explain with examples how the following are evidences in favour of evolution in organisms. (i) Homologous organs
|
|
1
|
672
|
April 2, 2019
|
|
Give one example each of character that are inherited and the ones that are acquired in human
|
|
1
|
1837
|
April 2, 2019
|
|
Mention any four details that can be inferred about organisms from their fossils
|
|
1
|
719
|
April 2, 2019
|
|
Name any three organs homologous to human hand. Why are they considered homologous?
|
|
1
|
829
|
April 2, 2019
|
|
How does speciation take place?
|
|
1
|
3231
|
July 16, 2018
|
|
How has the method of ‘artificial selection’ by humans helped in the evolution of different vegetables?
|
|
0
|
6187
|
March 20, 2018
|
|
Explain the ways in which evolutionary relationships can be traced
|
|
0
|
5263
|
March 20, 2018
|
|
What is speciation? List four factors that could lead to speciation
|
|
0
|
11687
|
March 20, 2018
|
|
What are fossils? How are they formed?
|
|
0
|
17845
|
March 20, 2018
|
|
Explain Mendel’s experiment with peas on inheritance of characters considering only one visible contrasting character
|
|
0
|
7605
|
March 20, 2018
|
|
Describe Darwin’s theory of evolution?
|
|
0
|
13615
|
March 20, 2018
|
|
What are the various evidences in favour of evolution?
|
|
0
|
6615
|
March 20, 2018
|
|
How do Mendel’s experiments show that the traits may be dominant or recessive
|
|
0
|
3063
|
March 20, 2018
|
|
In the following crosses write the characteristics of the progeny
|
|
0
|
1521
|
March 20, 2018
|
|
Mention any two points of difference between acquired and inherited traits
|
|
0
|
9121
|
March 20, 2018
|
|
Give the basic features of the mechanism of inheritance.?
|
|
0
|
3431
|
March 20, 2018
|
|
Explain with reason why giraffe has long neck
|
|
0
|
1861
|
March 20, 2018
|
|
Does geographical isolation of individuals of a species lead to formation of a new species? Provide a suitable explanation
|
|
0
|
957
|
March 20, 2018
|
|
List three factors that provide evidences in favour of evolution in organisms and state the role of each in brief
|
|
0
|
4802
|
March 20, 2018
|
|
In a cross between plants with pink flowers and plants with white flowers
|
|
0
|
6234
|
March 20, 2018
|
|
Name two homologous structures in vertebrates. Why are they so called?
|
|
0
|
3133
|
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
|
18004
|
March 19, 2018
|
|
Name the organism Mendel used for his experiments
|
|
0
|
4603
|
March 19, 2018
|
|
Describe the contribution of Lamarck
|
|
0
|
2432
|
March 19, 2018
|
|
Explain analogous organs and homologous organs
|
|
0
|
948
|
March 19, 2018
|
|
Mention three important features of fossils which help in the study of evolution.?
|
|
0
|
778
|
March 19, 2018
|
|
Planaria, insects, octopus and vertebrates all have eyes
|
|
0
|
1490
|
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
|
3050
|
March 19, 2018
|
|
. Explain the following:Speciation Natural Selection
|
|
0
|
1407
|
March 19, 2018
|
|
"Two areas of study namely ‘evolution’ and ‘classification’ are interlinked”. Justify this statement
|
|
0
|
9297
|
March 19, 2018
|