57. How is phosphorous returned to the environment?

Apopulation of black bears depends on salmon from a stream for food. if a drought causes the stream to run dry one year, how will this likely impact the black bear population?

As a result of wildfires, in grasslands. a) tree growth increases b) grass growth increases c) soil quality decreases d) invertebrate variety decreases

Connection compare and contrast genetic engineering to the process of natural selection. select all statements that are true.