What is the highest math level needed for the sat?

Class iii atmospheric hazards are those involving

The graph shows a trend in an ecosystem over time caused by increased pollution in the region. what can you conclude from the graph? a. there’s lower biodiversity among birds. b. there’s a higher reproductive rate among birds. c. there’s a significant decline in the number of producers. d. other types of animals were unaffected by pollution.

What did pavlov initially notice about the animals in his original research after conditioning took place?