Q1. In the small stream, you choose a rock and observe many small, flattened worms crawling on it are under surface. You decide that they belong to phylum Platyhelminthes. To which class do they probably belong?

Q2. Climate change is an environmental issue in the news almost daily. Air pollution impacts us on a global level. What are the implications of global warming? And, do you feel efforts to improve air quality are worth the economic costs?

Q3. What is nonassociative learning and what are the differences between associative and nonassociative learning?