tailieunhanh - IELTS Academic Reading Sample 85 - What Do Whales Feel

Nhằm giúp các bạn đang chuẩn bị bước vào kì thi quốc tế có thêm tài liệu ôn tập, giới thiệu đến các bạn IELTS Academic Reading Sample 85 - What Do Whales Feel để ôn tập nắm vững kiến thức cũng như giúp các bạn được làm quen trước với các dạng câu hỏi đề thi giúp các bạn tự tin hơn khi bước vào kì thi chính thức. | What Do Whales Feel An examination of the functioning of the senses in cetaceans the group of mammals comprising whales dolphins and porpoises Some of the senses that we and other terrestrial mammals take for granted are either reduced or absent in cetaceans or fail to function well in water. For example it appears from their brain structure that toothed species are unable to smell. Baleen species on the other hand appear to have some related brain structures but it is not known whether these are functional. It has been speculated that as the blowholes evolved and migrated to the top of the head the neural pathways serving sense of smell may have been nearly all sacrificed. Similarly although at least some cetaceans have taste buds the nerves serving these have degenerated or are rudimentary. The sense of touch has sometimes been described as weak too but this view is probably mistaken. Trainers of captive dolphins and small whales often remark on their animals responsiveness to being touched or rubbed and both captive and freeranging cetacean individuals of all species particularly adults and calves or members of the same subgroup appear to make frequent contact. This contact may help to maintain order within a group 3 and stroking or touching are part of the courtship ritual in most species. The area around the blowhole is also particularly sensitive and captive animals often object strongly to being touched there. ZIM ACADEMY Room 2501 Ocean Group Building 19 Nguyen Trai Thanh Xuan Dist Hanoi The sense of vision is developed to different degrees in different species. Baleen species studied at close quarters underwater specifically a grey whale calf in captivity for a year and free-ranging right whales and humpback whales studied and filmed off Argentina and Hawaii have obviously tracked objects with vision underwater and they can apparently see moderately well both in water and in air. However the position of the eyes so restricts the field of vision in baleen