Describe the association that exists between a termite and protozoan Trichonympha present in the gut of termite. How do they affect the life of each other? |
Or |
How can you check noise pollution near your school building? |
(i) Give two examples of species which have recently undergone extinction and state different causes of loss of biodiversity. |
(ii) What values does Ankit possess? |
(i) What are the main techniques that gave birth to modern biotechnology? |
(ii) What are the three basic steps for the genetic modification of an organism? |
Or |
(i) What is the role of selectable marker in a cloning vector? |
(ii) Why the coding sequence of \[\alpha \] - galactosidase is considered a better marker than the others found in pBR322 cloning vector? Explain. |
(i) State the phenotype and genotype of \[{{F}_{1}}\], generation. |
(ii) Predict the phenotypic ratio of \[{{F}_{2}}\], generation using a Punnett square. |
(i) What are the reasons of attraction of children towards the drugs these days? |
(ii) State any two different modes of consumption of such drugs. |
(iii) What values are shown by police? |
(i) Juvenile phase |
(ii) Reproductive phase |
(iii) Senescent phase |
Gametogenesis is the process by which haploid gametes are formed in male and female gonads. Given below is a flowchart showing the control of hormones on the process of gametogenesis. Observe it carefully and answer the questions that follow. |
(i) Identify X and Y in the flowchart. Which process is shown under the hormonal control? |
(ii) Explain the function of different hormones shown above. |
(i) Differentiate between B - lymphocytes and T - lymphocytes. |
(ii) Give the name of an autoimmune disease. |
(i) India is a geographically vast country and has enough land for agricultural purpose. However, it is important to develop new high yielding varieties of crops. Discuss. |
(ii) Write two high yielding varieties of wheat and rice. |
(i) What is the function of wisdom tooth? |
(ii) Why do we have organs like wisdom tooth in our body? |
(iii) What values were shown by the doctor? |
(i) Oral contraceptive pills are taken for birth control. Mala - D and Mala - N are called as combined contraceptive pills. Why? |
(ii) Why morning pills are considered as emergency contraceptives? |
Following are the pattern of inheritance that show deviation from Mendel's law. Describe each one with the help of an example. |
(i) Incomplete dominance |
(ii) Pleiotropy |
Or |
How is Human Genome Project (HGP) advantageous for the mankind? Which objectives were associated with it? |
(i) Typhoid and pneumonia are the bacterial diseases that infect human beings. Discuss the causative agent, symptoms and the way in which they infect the human body? |
(ii) Give one viral disease also. Mention its causative agent and vectors. |
Or |
What is an antibody? Give structure and its different types. |
Transgenic crops or genetically modified crops are being cultivated in many parts of the world. One of the main objectives of their production is to minimise the use of insecticides on cultivated crops. Explain with the help of a suitable example, how these genetically modified crops have been developed. |
Or |
Expand the name of the enzyme ADA. Why is the enzyme essential in the human body? Suggest a gene therapy for its deficiency. |
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