Step 1: 听力及题目练习
1. What is this lecture mainly about?
A. A typical Nepenthes habitat in Northeast Asia
B. New research findings regarding the life cycle of Nepenthes plants
C. A comparison of the predatory strategies of carnivorous plants and animals
D. An unusual characteristic of some species of Nepenthes plants
2. Why does the professor mention the soil in the forests of Southeastern Asia?
A. To suggest that Nepenthes plants are not native to that region
B. To explain why Nepenthes plants need to trap insects
C. To illustrate a difference between Nepenthes and other carnivorous plants
D. To provide an explanation for the different shapes and sizes of Nepenthes species
3. According to the professor what purpose is served by the waxy layer of the Nepenthes pitcher?
A. It attracts insects to enter the plant.
B. It produces the plant’s digestive enzymes.
C. It causes insects to slide down into the fluid in the pitcher.
D. It secretes a sticky substance that keeps trapped insects from escaping.
4. According to the professor what features of the Nepenthes Peristome help the plant catch insects?
Click on two answers
A. It has glands that produce nectar.
B. Its surface does not repel water.
C. It is slippery even when dry.
D. It has colorful markings that confuse some insects.
5.The professor explains that the Nepenthes plants trapping mechanism is not consistently activated by the presence of the ant. What does the professor imply about this inconsistency?
A. It might enable the plant to capture more prey over the long term.
B. It might explain why the plant has other ways of capturing prey.
C. It might result from the plants need for resting periods.
D. It might result from the severity of tropical rains.
6.What does the professor imply when he says this?
A. He has forgotten to include some important details.
B. Material he has just presented will be explained by his following statements.
C. Students may be surprised by additional findings.
D. He doubts that the researchers’ conclusions will be supported by further study.