The writer is considering adding the following sentence at the end of the third paragraph (sentences 8 and 9). The term ""rem sleep"" was first coined in 1953 by physiology professor and sleep researcher nathaniel kleitman and his graduate student eugene aserinsky. Should the writer add this sentence after sentence 9 ?

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.

These three organisms are interdependent on each other for their survival. what will happen if foxes are eliminated from the region? a. there will be more rabbits and less grass in the region. b. there will be more grass and fewer rabbits in the region. c. there will be fewer rabbits and less grass in the region. d. there will be more rabbits and more grass in the region.

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