Cow dung and water is mixed and this slurry is fed into the biogas plant for digestion by microbes. The person performing the process shares that there is no need to provide any inoculum for it. Give reason. What is the role of microbes at the source? Under which condition will they be most active and effective?

Refer to the figure given below and answer the questions that follow:

(a) Explain the process by which Tasmanian wolf evolved.

(b) Name the process that has resulted in evolution of wolf and Tasmanian wolf.

(c) Compare and contrast the two animals shown?

Your classmate complains of headache and cough. On the basis of certain symptoms, the doctor confirms that he is suffering from Pneumonia and not common cold. List these symptoms. Mention any two precautions to be followed to prevent the spread of this disease.

A person is born with a weakened immune system due to deficiency of an enzyme which a hereditary disease is. Suggest a technique to completely cure this disease, identify the deficient enzyme and explain the technique used, for cure.

A doctor prescribed morphine as a sedative and pain killer to your cousin who had undergone a surgery. Even after recovery, he indiscriminately took the medicines and later craved for the same. What do you conclude about his condition? What measures will you suggest to him to overcome this problem? Briefly explain any two.