Who studied how bats use ultrasound to detect their prey? Doppler Boyle Mersenne Spallanzani

Explain how bats use ultrasound to catch prey.

True or false? Ultrasound cannot be detected by the human ear but other animals like dogs and bats can hear it.FALSETRUE

A new study was released reporting that vampire bats may be unable to learn important information about food sources that make them sick. Most mammals are able to learn from their meal mistakes. Typically, if a mammal eats a novel food that later makes it sick, it will form an aversion to the food. This means the animal will learn not to return to that particular food source. Interestingly enough, vampire bats are unable to learn this lesson.In a recent study at the University of Toronto, several types of bats were used to test their food aversion formations: fruit bats, common brown bats, and vampire bats. In the research study, all three types of bats were fed meals laced with cinnamon, a spice they would be able to detect. After eating, the bats were given an injection that made them vomit. The next time the bats were fed, their food was again spiced with cinnamon. The fruit bat and common brown bat did not consume the food. They had learned from previous experience to avoid it. However, the vampire bat returned to the food source that made it sick. When results of other trials proved consistent, scientists were able to conclude that vampire bats are unable to form food aversions.Scientists are speculating that somehow vampire bats must have lost the adaptation that allows the formation of food aversions. They hypothesize that this may be related to the fact that a vampire bat’s diet consists mostly of animal blood, which contains fewer toxins than certain insects and plants that other bats eat. Because they encounter much less toxicity in their diet, there may be no need for them to form food aversions. Scientists suggest that further studies in which a variety of foods are used would be most helpful in determining what causes the vampire bats to return to food sources, despite the possibility of impending ailment.Milius, Susan. "Vampire Bats Don't Learn from Bad Lunch." Science News. 15 Mar. 2003: 173. Print.SubmitAccording to the passage, vampire bats are unlike other bats in that they are unable toAdigest animal bloodBlearn food aversionsCreturn to food sourcesDfind novel foods

How is sound produced in school bell?Q18. Bats have no eyes then how do they catch their prey?Q19. Write the uses of ULTRASOUND.Q20. Write three uses of multiple reflection of sound.

Which of the following animals use echolocation? (May choose more than one answer)Question 18Answera.Horsesb.Cattlec.Dogsd.Whalese.Bats