[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
Line becoming adapted to a different climatic envi-
(5) ronment, type of food supply, or mode of liv-
ing. 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-
(10) 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
(15) 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;
(20) for digging (fossorial) a

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[多项选择]Both plants and animals of many sorts show
remarkable changes in form, structure, growth
habits, and even mode of reproduction in
Line becoming adapted to a different climatic envi-
(5) ronment, type of food supply, or mode of liv-
ing. 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-
(10) 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
(15) 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;
(20) for digging (fossorial) a

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[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

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[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

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[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 (
A. Adoptive Divergence
B. Evolution
C. Unusual Structures
D. Changes in Organs

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[简答题]

Many animals and plants threatened with extinction could be saved if scientists spent more time talking with the native people whose knowledge of local species is dying out as fast as their languages are being lost.
Potentially vital information about many endangered species is locked in the vocabulary and expressions of local people, yet biologists are failing to tap into this huge source of knowledge before it is lost for good, scientists said. "It seems logical that the biologists should go and talk to the indigenous people who know more about the local environment than anyone else," said David Harrison, an assistant professor of linguistics at Swarthmore College in Pennsylvania.
"Most of what humans know about ecosystems and species is not found in databases or libraries or written down anywhere. It’s in people’s heads. It’s in purely oral traditions," Dr. Harrison told the American Association for the Advancement of Science in San Fran

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[填空题]Many plant foods provide both many vitamins and minerals of very few calories.

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