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Respiration in humans
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4
|
2543
|
July 21, 2022
|
|
A pea plant with blue colour flower denoted by BB is cross-bred with a pea plant with white flower denoted by ww
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|
1
|
12953
|
August 17, 2020
|
|
In the given figure, a narrow beam of white light is shown to pass through a triangular glass prism. After passing through the prism it produces a spectrum XY on a screen
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2
|
16394
|
December 8, 2019
|
|
With the help of a chemical equation, explain how a soda-acid fire extinguisher helps in putting out a fire
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1
|
14633
|
August 5, 2019
|
|
Why do metals not evolve hydrogen gas with nitric acid?
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|
1
|
2801
|
December 27, 2018
|
|
Why is the red light used as a danger signal
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|
4
|
1880
|
December 16, 2018
|
|
How does speciation take place?
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|
1
|
3228
|
July 16, 2018
|
|
Is it safe for the electrician to carry out electrical repairs outdoors during heavy downpour? Explain
|
|
0
|
1314
|
March 22, 2018
|
|
Give any two uses of kinetic energy
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|
0
|
3757
|
March 21, 2018
|
|
What are the three limitations which one has to face while dealing with an infectious disease?
|
|
0
|
8027
|
March 21, 2018
|
|
What are the constituents of a balanced diet?
|
|
0
|
2361
|
March 21, 2018
|
|
What are the types of food requirements of dairy animals?
|
|
0
|
6184
|
March 20, 2018
|
|
Discuss why pesticides are used in very accurate concentration and in very appropriate manner
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|
0
|
3504
|
March 20, 2018
|
|
Differentiate between fertilisers and manures
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|
0
|
15044
|
March 20, 2018
|
|
How is ozone layer useful to us?
|
|
0
|
5020
|
March 20, 2018
|
|
How has the method of ‘artificial selection’ by humans helped in the evolution of different vegetables?
|
|
0
|
6184
|
March 20, 2018
|
|
Explain the ways in which evolutionary relationships can be traced
|
|
0
|
5260
|
March 20, 2018
|
|
What is speciation? List four factors that could lead to speciation
|
|
0
|
11675
|
March 20, 2018
|
|
What are fossils? How are they formed?
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|
0
|
17841
|
March 20, 2018
|
|
Explain Mendel’s experiment with peas on inheritance of characters considering only one visible contrasting character
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|
0
|
7598
|
March 20, 2018
|
|
Describe Darwin’s theory of evolution?
|
|
0
|
13608
|
March 20, 2018
|
|
What are the various evidences in favour of evolution?
|
|
0
|
6603
|
March 20, 2018
|
|
How do Mendel’s experiments show that the traits may be dominant or recessive
|
|
0
|
3056
|
March 20, 2018
|
|
In the following crosses write the characteristics of the progeny
|
|
0
|
1518
|
March 20, 2018
|
|
Mention any two points of difference between acquired and inherited traits
|
|
0
|
9103
|
March 20, 2018
|
|
Give the basic features of the mechanism of inheritance.?
|
|
0
|
3425
|
March 20, 2018
|
|
Explain with reason why giraffe has long neck
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|
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
|
953
|
March 20, 2018
|
|
List three factors that provide evidences in favour of evolution in organisms and state the role of each in brief
|
|
0
|
4797
|
March 20, 2018
|
|
In a cross between plants with pink flowers and plants with white flowers
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|
0
|
6226
|
March 20, 2018
|