Q1. Johnny, a 5-year-old boy, has been growing by leaps and bounds; his height is 100 percent above normal range for age. He has been complaining of headaches and vision problems. A CT scan reveals a large pituitary tumour. (a) What hormone is being secreted in excess? (b) What condition would Johnny exhibit if corrective measures are not taken? (c) What is the likely cause of his headaches and visual problems?

Q2. Explain the differences in population growth patterns of the two paramecium species. What does this tell you about how Paramecium aurelia uses available resources?