[单项选择]The lipstick marks on the animals’ heads show that people ______.
A. are cruel with their animals
B. spend more money on animals than on their children
C. are treating their animals too well
D. are making up their animals

[单项选择]The lipstick marks on the animals’ heads show that people ______.
A. are cruel with their animals
B. spend more money on animals than on their children
C. are treating their animals too well
D. are making up their animals

[单项选择]Both plants and animals of many sorts show
remarkable changes in form, structure, growth
habits, and even mode of reproduction in becom-
Line ing adapted to different climatic environment,
(5) types 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 discernible. For
(10) 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
(15) limbs of various mammals are modified according
to several different modes of life—for swift run-
ning (cursorial) as in the horse and antelope, for
swingi
A. Adaptive Divergence
B. Evolution
C. Unusual Structures
D. Changes in Organs
E. (E) Our Changing Bodies

[单项选择]Both plants and animals of many sorts show remarkable changes in form, structure, growth habits, and even mode of reproduction in becoming adapted to different climatic environment, types 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 discernible. For example, the creeping foot of the snail is seen in related marine preemptors to be modified into a flapping organ useful for swimming, and is changed into prehensile arms that bear sartorial 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 to several different modes of life—for swinging in trees (arboreal) as in the monkey, for digging ( fossorial ) as in the moles and gophers, for flying (volant) as in the bats, for swimmin
A. Adoptive Divergence
B. Evolution
C. Unusual Structures
D. Changes in Organs

[单项选择]