In the early 1900s, which invention was most needed to help run offices and factories? telegraphs electricity elevated trains mass-produced steel

The way individuals think, believe, and behave defines their: a. intellectual wellness b. personality c. self-esteem d. self-actualization

The authors use the word “backbone” in lines 3 and 39 to indicate that

The graph shows the populations of two species in a particular region over two decades. based on the graph, what can you conclude about the relationship between the two species? a. the two species have a parasitic relationship. b. the two species are mutualistic in nature. c. the two species exhibit commensalism. d. the two species have a prey-predator relationship. e. the two species have a familial relationship.