单项选择题
remarkable changes in form, structure, growth habits, and even mode of reproduction in Line becoming adapted to a different climatic envi-ronment, type of food supply, or mode of living. This divergence in response to evolution is commonly expressed by altering the form and function of some part or parts of the organism, the original identity of which is clearly dis-cernible. For example, the creeping foot of the snail is seen in related marine pteropods to be modified into a flapping organ useful for swimming, and is changed into prehensile arms that bear suctorial disks in the squids and other cephalopods. The limbs of various mammals are modified according to several different modes of life for swift running (cursorial) as in the horse and antelope; for swinging in trees (arboreal) as in the monkeys; for digging (fossorial) as in the moles and gophers; for flying (volant) as in the bats; for swimming (aquatic) as in the seals, whales, and dolphins; and for other adaptations. The structures or organs that show main change in connection with this adaptive divergence are commonly identified readily as homologous, in spite of great alterations. Thus, the finger and wrist bones of a bat and whale, for instance, have virtually nothing in common except that they are definitely equivalent elements of the mammalian limb.
Directions: For the following question, consider each question separately and select all that apply.
Although there are no physical differences between the visual organs of the two groups, the inhabitants of the Bilge Islands, when shown a card displaying a spectrum of colors, perceived fewer colors than do most persons in the United States.
Which of the following conclusions can most reliably be drawn from the information above（）
A、Human color perception is at least partly determined by factors other than the physical structure of the visual organs.
B、The Bilge Islanders are probably taught in childhood to recognize fewer colors than are persons in the United States.
C、Differences in social structure probably affect color perception.
D、Color perception in humans is influenced by differences in physical environment.
E、Bilge Islanders may have fewer terms denoting colors in their language than do English-speaking persons.