【正文】 low the leaves.178。 Deposing leaves generate heat, creating a warm microclimate.178。 To refer to a wellknow misconception about reptiles178。 To provide an example that may be an exception to the professor’s statement178。s habitat range has expandedTo describe the functioning of the circulatory system of the North American wood frogTo introduce students to an unusual phenomenon affecting North American wood frogs30. Why does the professor first mention the arrival of spring?To encourage students to look for thawing wood frogsTo point out the time period when frogs begin matingTo explain why the class will soon be doing experiments with wood frogsTo emphasize the speed of the thawing process31. What happens to a wood frog as it begins to freeze?Blood is concentrated in the center of its body.Blood stops producing sugarWater moves out of its internal organs.Water from lust beneath the skin begins to evaporate32. What are two points the professor makes about the thawing process of the wood frog? Click on 2 answers.The thawing process is not fully understood.The thawing process takes longer than the freezing process.The frog39。s heart begins pumping glucose through its body.33. What impact does freezing have on some thawed wood frogs?It increases their reproductive success.It decreases their life span.It causes them to be more vocal and active.It reduces their ability to recognize potential mates.34. What does the professor imply when she says this:She wants the student to clarify his question.She wants the student to draw his own conclusions.She thinks the student does not understand how car antifreeze worksShe thinks the student has misunderstood her pointTPO 20 Lecture 412. What is the lecture mainly about?Typical features of the snowshoe hare that do not result from adaptationVarious strategies used by snowshoe hares to find food during the winterCharacteristics that snowshoe hares have developed in response to their environmentInteractions between snowshoe hares and human populations in the state of Maine13. According to the professor, what causes the snowshoe hare’s fur to begin turning white?A decrease in the hours that the Sun is up each dayA sudden drop in temperatureThe increasing amount of snow on the groundThe changing nature of the food supply14. Why might an early snowfall be a particularly dangerous time for the snowshoe hare?Its feet would not yet have grown to resemble snowshoes.Its babies would not yet be able to keep themselves warm.Its chances of being seen by a predator are much higher.It might not be able to locate where it stored its food supply.15. The professor implies that the snowshoe hare has an advantage over other animals because of its unusual feet. What is that advantage?It can reach food in higher locations better than its petitors.It can stay warm in cold weather longer than its petitors.It can outrun its predators in deep snow.It can dig under the snow to hide from its predators.16. The professor explains that the snowshoe hare’s food supply is available yearround. What does the availability of food allow the snowshoe hare to do?Store body fat for the cold monthsRemain lightweight through the winterGive birth during the winterGrow fur quickly during the first year after birth17. Why does the student say this:He wants to support the professor’s point with an example.He is grateful the professor has answered his question.The professor’s explanation contradicts his own experience.The professor may not believe he is telling the truth.TPO 21 Lecture 36. What is the lecture mainly about?Methods of analyzing toxic proteins in snake venomInsights about snake evolution provided by venom analysisHow snake venom differs from lizard venomWhy colubrids are considered nonvenomous snakes7. Why does the professor review information about the classification of snakes that students probably learned in previous courses?To determine whether the students have enrolled in the appropriate courseTo stress the usefulness of the classification system for studentsTo present assumptions that have recently been challengedTo give an example of a method that she will explain in greater detail8. According to the professor, what is a major weakness of the classification system that is based on animals39。s attitude toward the results from medical research on snake venom proteins?She is enthusiastic about the drugs that have been tested to date.She is concerned about the side effects of drugs created from snake venom proteins.She doubts that the DNA database will be useful in developing new drugs.She thinks it is too early to tell how successful the research will be.TPO 22 Lecture 323. What is the lecture mainly about39。s population from growing too large.The cheetah was a factor in the development of the antelope39。s melon?An ovalshaped bone that lets the dolphin hear soundsAn organ made of fat tissue that helps a dolphin send sound wavesAn airfilled cavity that lets the dolphin breathe underwaterAn organ filled with water that helps the dolphin measure depth26. What is the dolphin39。s opinion about the television program that she mentions?She is concerned about the accuracy of some of the information the experts provided.She is hopeful that the class will be able to discuss it.She thinks it was overly critical of some recent theories about crocodiles.She is surprised that it did not include more examples of crocodile munication.10. Why does the professor mention dogs?To explain that mammals are more plex than reptilesTo point out that crocodiles can municate with dogsTo give an example of mammals that care for their youngTo emphasize that crocodiles have highly developed brains11. What happens when a hatchling makes a distress call?Its siblings answer back.The mother repeats the call.Th