4. According to the professor, what is the role of chemosynthesis in biological communities that are found near hydrothermal vents?
A. It enables organisms to convert hydrogen sulfide into food. B. It enables organisms to convert tiny amounts of light into energy. C. It enables organisms to withstand large amounts of carbon dioxide. D. It enables organisms to regulate their temperature. 5 . Why does the professor mention the bacteria that live inside a tube worm? A. To give an example of organisms that pose a threat to tube worms
B . To explain what provides the organic material that tube worms use for energy C. To give an example of other organisms that can withstand extreme heat D. To give an example of organisms that are involved in both chemosynthesis and photosynthesis
6. Listen again to part of the lecture, then answer the question. What does the professor imply when she says this: A. She will review information from the assigned chapter.
B. She will present additional information related to the assigned chapter. C. The quiz on the assigned chapter will be longer than other quizzes. D. The class has spent too much time on the assigned chapter.
Activity 7.5: Word Stress—Biology Lecture Listening for word stress can help you understand what a speaker means. Directions: • Listen to the lecture again while reading the script at the end of this section. Scan the QR code to listen to the audio track. • Underline the stressed words while you listen to the lecture.
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