46. According to the passage, the willow tree was able to communicate with other tree by 1. waving its branches 2. dropping its leaves 3. giving off a special vapor 4, changing the color of its trunk
47. According to the passage, bees communicate by 1. touching one another 2, smiling one another 3, making unusual sounds 4. making special movement
48. The author states that bees are able to tell each other about the location of 1. honey 2, people 3, nectar 4, beehives
49. The word "ways", as used at the end of the passage, could best be replaced by which of the following? 1. methods 2. features 3. directions 4, categories
50. which of the following statements best describes the organization of the passage? 1. A specific case is given to illustrate a general principle. 2. A scientific term is invented and its definition is provided. 3. The views of two researchers are described and contrasted. 4. A phenomenon is described and some possible causes are suggested