The graph provided presents information on changes in the population of a predator and its prey over time
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Which of the following best explains the increases and decreases in the predator population?
The paramecium competed with the yeast.
Populations always achieve a stable level
There were variations in the food supply
Predators migrate frequently

What is zinn's approach to the study of history? what does he suggest occurs when history is told is the story of human progress?

Which statement in the passage best reflects sumer's opinion of the dred scott decision? a."i speak what cannot be denied." b."[the] judgment was sustained by a falsification of history." b."the opinion was more thoroughly abominable than anything history." i speak what cannot be denied when i declare that the opinion of the chief justice in the case of dred scott was more thoroughly abominable than anything of the kind in the history of courts. judicial baseness reached its lowest point on that occasion. you have not forgotten that terrible decision where a most unrighteous judgment was sustained by a falsification of history. -charles sumner, 1865

Which describes a contribution from classical rome to modern western civilization? a. international gathering to celebrate sporting achievement b. written constitution based on natural rights c. large infrastructure projects to benefit the public d. direct election of the ruler by all residents of the empire