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Explain the relationship between CFC’s and Ozone in the stratosphere.
Concept: Ozone Layer Depletion >> Ozone Depletion in the Stratosphere
Name any two sources of e-Wastes and write two difference ways of their disposal.
Concept: Radioactive Waste Management and E-waste
How have human activities caused desertification? Explain.
Concept: Degradation by Improper Resource Utilisation and Maintenance
State the difference between meiocyte and gamete with respect to chromosome number.
Concept: Chromosomal Theory of Inheritance
Differentiate between male and female heterogamety.
Concept: Sex Determination
Differentiate between ‘ZZ’ and ‘XY’ type of sex-determination mechanisms.
Concept: Sex Determination
Name the type of cell division involved in the production of sperms by honey bees.
Concept: Chromosomal Theory of Inheritance
Why did T. H. Morgan select Drosophila melanogaster to study sex linked genes for his lab experiments ?
Concept: Sex Determination
Name the pollutant attributed to be the cause of ‘ozone-hole’ over the Antarctica region.
Concept: Ozone Layer Depletion >> Ozone Depletion in the Stratosphere
List the greenhouse gases other than carbon dioxide.
Concept: Greenhouse Effect and Climate Change
What is heterogamety ? Explain the mechanism of sex determinatin in Drosophila.
Concept: Sex Determination
How would you find out whether a given tall garden pea plant is homozygous or heterzygous? Substantiate your answer with the help fo Punnett squares.
Concept: Monohybrid Cross
Given below are the F2 – phenotypic ratios of two independently carried monohybrid crosses :
(i) 1 : 2 : 1
(ii) 3 : 1
Mention what does each ratio suggest.
Concept: Monohybrid Cross
Answer the following question.
Name the layer of the atmosphere that is associated with ‘good ozone’.
Concept: Ozone Layer Depletion >> Ozone Depletion in the Stratosphere
Answer the following question.
Write the basis on which Alfred Sturtevant explained gene mapping.
Concept: Monohybrid Cross
Answer the following question.
Name the layer of the atmosphere that is associated with 'good ozone'.
Concept: Ozone Layer Depletion >> Ozone Depletion in the Stratosphere
Answer the following question.
Compare in any three ways the chromosomal theory of inheritance as proposed by Sutton and Bovery with that of experimental results on pea plant presented by Mendel.
Concept: Chromosomal Theory of Inheritance
An electrostatic precipitator in a thermal power plant is not able to generate a high voltage of several thousand. Write the ecological implication because of it.
Concept: Radioactive Waste Management and E-waste
Answer the following question.
List four benefits to human life by eliminating the use of CFCs.
Concept: Greenhouse Effect and Climate Change
Justify the need for the signing of the 'Montreal Protocol' by the participating nations in 1987.
Concept: Ozone Layer Depletion >> Ozone Depletion in the Stratosphere
