Respiration in humans
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3
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2040
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October 18, 2021
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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
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12100
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August 17, 2020
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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
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13033
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December 8, 2019
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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
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13565
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August 5, 2019
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Why do metals not evolve hydrogen gas with nitric acid?
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1
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2487
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December 27, 2018
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Why is the red light used as a danger signal
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4
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1663
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December 16, 2018
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How does speciation take place?
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1
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2867
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July 16, 2018
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Is it safe for the electrician to carry out electrical repairs outdoors during heavy downpour? Explain
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0
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947
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March 22, 2018
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Give any two uses of kinetic energy
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0
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2909
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March 21, 2018
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What are the three limitations which one has to face while dealing with an infectious disease?
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0
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7704
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March 21, 2018
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What are the constituents of a balanced diet?
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0
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1908
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March 21, 2018
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What are the types of food requirements of dairy animals?
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0
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4893
|
March 20, 2018
|
Discuss why pesticides are used in very accurate concentration and in very appropriate manner
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0
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3232
|
March 20, 2018
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Differentiate between fertilisers and manures
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0
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10187
|
March 20, 2018
|
How is ozone layer useful to us?
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0
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4386
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March 20, 2018
|
How has the method of ‘artificial selection’ by humans helped in the evolution of different vegetables?
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0
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5781
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March 20, 2018
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Explain the ways in which evolutionary relationships can be traced
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0
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5044
|
March 20, 2018
|
What is speciation? List four factors that could lead to speciation
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0
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11235
|
March 20, 2018
|
What are fossils? How are they formed?
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0
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16864
|
March 20, 2018
|
Explain Mendel’s experiment with peas on inheritance of characters considering only one visible contrasting character
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0
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6568
|
March 20, 2018
|
Describe Darwin’s theory of evolution?
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0
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13099
|
March 20, 2018
|
What are the various evidences in favour of evolution?
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0
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5706
|
March 20, 2018
|
How do Mendel’s experiments show that the traits may be dominant or recessive
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0
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2585
|
March 20, 2018
|
In the following crosses write the characteristics of the progeny
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0
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1204
|
March 20, 2018
|
Mention any two points of difference between acquired and inherited traits
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0
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6426
|
March 20, 2018
|
Give the basic features of the mechanism of inheritance.?
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0
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3062
|
March 20, 2018
|
Explain with reason why giraffe has long neck
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0
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1612
|
March 20, 2018
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Does geographical isolation of individuals of a species lead to formation of a new species? Provide a suitable explanation
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0
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744
|
March 20, 2018
|
List three factors that provide evidences in favour of evolution in organisms and state the role of each in brief
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0
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4287
|
March 20, 2018
|
In a cross between plants with pink flowers and plants with white flowers
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0
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4538
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March 20, 2018
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