Q1. Many species might reproduce either asexually or sexually. It is frequently when the environment changes in some way that is unfavourable to an existing population that the organisms begin to reproduce sexually. Explain the importance of this switch from asexual to sexual reproduction.

Q2. A 38-year-old patient was admitted to the hospital with a diagnosis of cirrhosis of the liver. He is thin and malnourished. His abdomen is very large by reason of an accumulation of fluid in the abdominal cavity. His lower extremities are very swollen. Describe why these changes have occurred.