According to the food chain diagram, which of the following animals has no natural predators?

Correct Answer: B

Rationale: The correct answer is B, Cobra. In the food chain diagram, cobras are often considered apex predators, meaning they are at the top of the food chain and do not have natural predators. Vultures (choice A), although scavengers, may face competition but not direct predators. Mongooses (choice C) are known for preying on snakes, including cobras, and aardvarks (choice D) are part of the food chain and have predators like lions and hyenas.

Correct Answer: B

Rationale: In the context provided, the word 'propagated' indicates that Xavier conveyed or expressed his belief to his friends. 'Expressed' is the most suitable synonym here as it aligns with the idea of communicating a belief clearly. The other options, 'shouted,' 'persuaded,' and 'whispered,' do not capture the essence of spreading or communicating an idea, making them incorrect choices.

Correct Answer: C

Rationale: The correct answer is C. A gene splicing study report with data is a primary source because it provides original research findings. In contrast, choice A is a secondary source as it involves a critic's interpretation of a book. Choice B, the table of contents of a peer-reviewed scientific journal, is not a primary source but a tertiary source, providing a summary of articles. Choice D, a news article quoting research, is a secondary source that presents information based on primary sources rather than the original research itself.

Correct Answer: A

Rationale: The author uses heading and subheadings to organize the passage. Each subheading focuses on either dairy (e.g., beverages, meals, snacks, dessert) or non-dairy options for obtaining more calcium from food. This organizational structure makes it easier for readers to identify and understand the different categories of tips provided within the text. Choices B, C, and D are incorrect because superscripts, diagrams, labels, and footnotes are not used as organizational features in the passage; instead, headings and subheadings play a key role in structuring the information.

Correct Answer: D

Rationale: The focus of the passage is on Malory and Tennyson and their interpretations of the Arthurian legends. The mention of Charles Dickens in choice D is irrelevant and distracts the reader from the main discussion. While the other choices discuss Malory's prose style, his focus on moral elements, and Tennyson's approach to the Arthurian stories, choice D brings in a comparison to Charles Dickens and his novels about lower-class children in Victorian England. This mention of Dickens does not directly relate to the main theme of the passage, making it the correct answer as the distracting sentence.

Correct Answer: B

Rationale: Clothilde should look for more information in Chapter 9, 'Herbs for Immunity,' as her sister's daughter has a chronic cough. Immune-boosting herbs may help strengthen the child's immune system and potentially alleviate the cough. Chapter 9 focuses on herbs that support immune health, making it the most relevant chapter for addressing a chronic cough related to immunity. Chapters 7, 10, and 12 do not specifically focus on immunity or respiratory conditions, making them less likely to provide the information Clothilde needs.

Correct Answer: A

Rationale: A history textbook is the most appropriate place for the passage about George Washington because it provides historical context, factual information, and analysis of significant events related to his life and contributions. The passage discusses Washington's role in the American Revolution, his leadership during the Revolutionary War, his decision to step down after the war, his farewell address, and his views on governance and foreign affairs. This type of detailed historical content is commonly found in history textbooks. Choices B, C, and D are incorrect because an obituary focuses on a person's death and life achievements in a brief manner, a fictional story is based on imagination and creativity, and a newspaper editorial typically presents opinions on current events or issues rather than historical accounts.

Correct Answer: D

Rationale: The purpose of the italics used for several words in the sentence is to indicate books that Angela completed during the summer. The italics are used for titles of books or literary works, showing emphasis or highlighting specific titles. In the provided extract, titles like 'The Great Gatsby,' 'Brave New World,' and 'A Passage to India' are italicized, indicating completed readings. Choice A is incorrect as it does not accurately reflect the purpose of italics in this context. Choice B is incorrect because the use of italics does not specifically indicate classic literature. Choice C is also incorrect as the italics are not related to recommendations but rather completion of reading.

Correct Answer: C

Rationale: Based on the Dewey Decimal System, which is a library classification system, the subjects related to Chomsky's work, which touches on philosophy, social sciences, and history, fall under classes 100, 400, and 900. Therefore, these classes would be the most useful for Teddy's history paper about the United States during the Cold War. Choices A, B, and D are incorrect because they do not include the specific classes related to the required subjects for Teddy's paper.