Central Ideas & Concepts Mock Tests

Read the following passage: "Mitochondria are often called the powerhouses of the cell because they generate most of the cell's supply of adenosine triphosphate (ATP), which is used as a source of chemical energy. Unlike most other organelles, mitochondria have their own DNA and can reproduce independently within the cell. This dual genetic system supports the endosymbiotic theory, which proposes that mitochondria originated as free-living bacteria that were engulfed by an ancestral cell." According to the passage, what evidence supports the endosymbiotic theory of mitochondria?

In this excerpt from a scientific journal about climate change: "Arctic sea ice has declined at an alarming rate over the past four decades. Satellite data from 1980 to 2020 shows that September minimum ice extent has decreased by approximately 13 percent per decade. This rapid decline threatens polar bear populations, disrupts indigenous communities that rely on stable ice for hunting, and contributes to further warming through the albedo effect, where darker ocean water absorbs more solar radiation than reflective ice." The passage primarily serves to: a) propose solutions for reversing Arctic ice decline b) describe the consequences of declining Arctic sea ice c) argue that satellite data is unreliable for climate research d) compare Arctic ice decline with Antarctic ice trends

Read the following passage about the circadian rhythm: "Nearly every living organism operates on an internal biological clock known as the circadian rhythm, which follows roughly a 24-hour cycle. This rhythm influences sleep patterns, hormone release, body temperature, and metabolism. Modern life, with its artificial lighting and screen time, often disrupts these natural cycles, leading to sleep disorders, mood disturbances, and decreased cognitive performance." Which choice best summarizes the main idea of the passage?

As part of a research summary on marine biology: "Coral reefs exist in a delicate symbiotic relationship with microscopic algae called zooxanthellae, which live inside coral tissues and provide up to 90 percent of the coral's energy through photosynthesis. When ocean temperatures rise even 1 degree Celsius above normal, corals expel these algae, causing coral bleaching — a phenomenon where corals turn white and become vulnerable to starvation and disease." What does the passage most directly suggest about the relationship between zooxanthellae and coral?

In this excerpt from a memoir, the author describes returning to their hometown after many years: "Main Street looked smaller than I remembered, the old cinema now a grocery store, the park where we used to play baseball reduced to a single bench and a rusted swing set. Yet the smell of the river at dusk — that hadn't changed at all." What does the author most strongly suggest about their memories of the town?

In this excerpt from a biography of Rosa Parks: "Parks's act of defiance on a Montgomery bus in 1955 was not a spontaneous gesture of tiredness, as the popular narrative suggests. She was a trained activist who had been working with the NAACP for years. Her choice to remain seated was a deliberate political act, informed by a deep understanding of the civil rights movement. The myth of the tired seamstress obscures the reality of Parks's strategic courage." The author of the passage primarily argues that Rosa Parks: a) was randomly selected to be tested on the bus b) acted strategically as part of a broader movement c) was forced to remain seated by the bus driver d) had never been involved in civil rights activism before that day

In this excerpt from a letter to a newspaper editor: "The proposed increase in property taxes to fund public schools is misguided. Education funding should come from a broader tax base, not from individual homeowners who are already struggling with rising costs. A more equitable solution would involve redistributing existing state resources more efficiently before imposing additional burdens on families." The author of the letter primarily argues that: a) property taxes should be eliminated entirely b) the current proposal places an unfair burden on homeowners c) state resources are being wasted on unnecessary programs d) public schools do not need additional funding

Read the following passage: "In 1848, the Seneca Falls Convention produced the Declaration of Sentiments, a document modeled on the Declaration of Independence that declared 'all men and women are created equal.' Elizabeth Cady Stanton, who authored the Declaration, and Lucretia Mott, who helped organize the convention, laid the groundwork for the women's rights movement in the United States." What is the primary purpose of the passage?