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Q1 State the cause of accelerated eutrophication.
Q2 Identify 'a' and 'b' in the figure given bel...
Q3 Give an example of an organism that enters 'diapause'...
Q4 Name the two intermediate hosts...
Q5 Mention the type of host cells suitable for the gene guns to...
Q6 Name any two types of cells that act as 'cellular barrie...
Q7 Mention how does DNA polymorphism arise in a population.
Q8 Write the name of the organism that is referred to as the ...
Q9 Name the organic materials exin...
Q10 (i) Name the scientist who suggested that the genetic code s...
Q11 How does the gene 'I' control ABO blood groups in hu...
Q12 A cross was carried out between two pea plants showing the c...
Q13 How can healthy potato plants be obtained from a desired pot...
Q14 How are 'sticky ends' formed on a DNA strand? Why ar...
Q15 What is bio-piracy? State the initiative taken by the Indian...
Q16 Construct an age pyramid which reflects a stable growth stat...
Q17 Apart from being a part of the ...
Q18 Write the role of Ori and 'restriction' site in a cl...
Q19 A colour-blind child is born to...
Q20 A cross between a normal couple...
Q21 Women are often blamed for prod...
Q22 Draw a labelled diagram of the ...
Q23 (i) What is primary productivity ? Why does it vary in diffe...
Q24 Study the graph given below and answer the questions that fo...
Q25 How did the process of RNA inte...
Q26 Why are beehives kept in a crop field during flowering perio...
Q27 (a) Name the tropical sugar cane variety grown in South Indi...
Q28 (a) Explain the process of DNA ...
Q29 (a) Name the technology that has ...
Q30 Explain the ovarian and uterine e...