Q1. 1. Why are some fruits sweet and some sour, whereas others have no specific taste?

2. How does ripening of fruit affect the process of seed dispersal?

3. How do humans interfere in this process by consuming grains and fruits?

4. Does the seed use the fructose or starch in fruits for its metabolism?

Q2. Pneumonia is diagnosed by a presence of fluid (dark shadows in an X-ray image) in the alveoli. Given that pneumonia generally is caused by a microorganism, what causes the fluid accumulation? Name a bacterium, a virus, a fungus, a protozoan, and a helminth that can cause pneumonia.