No more than 4 sentences answer the following questions. 2 or 3 sentences is better.
1. Living earth： Find evidence that organisms helped shape the environment on earth
2. Marine Life: Which predator has evolved to feed exclusively on oysters? Think about this in an optimal foraging context. How might this animal be limited to maximizing a trade-off between searching and handling food? (I will give information to answer)
3. New England Forest: Do you think these Amphibians in New England Forest are R-selected or K-selected organisms? why?