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题型:阅读理解-阅读单选 难度:0.65 引用次数:34 题号:13747818

Baby giraffes inherit aspects of their mothers’ patterning—which could give them a survival advantage if good camouflage runs in the family. Just like humans have unique sets of fingerprints, every giraffe has a unique set of spots.

Derek Lee is a wildlife biologist and population ecologist at Penn State, and with the Wild Nature Institute, a research consulting group. He and his colleagues have been tracking giraffes for seven years, throughout 1,500 square miles in Tanzania.

Now, they’ve used image analysis software to study the spots of mothers and their babies. And they found that baby giraffes inherit at least some particular elements of their patterning from their mothers, like how circular the spots are. They also found that baby giraffes with larger spots have better chance to survive their first months, because the spots are more like the dappled sunlight in the bushes where baby giraffes like to hide from hungry lions and hyenas(wild animals like dogs).

The results—and a lot of giraffe patterns—are recorded and explained in the journal Peer J.[Lee et al., Seeing spots: quantifying mother­offspring similarity and assessing fitness consequences of coat pattern traits in a wild population of giraffes (Giraffa camelopardalis)]

It’s perhaps not surprising that a physical characteristic that protects an individual from being eaten passes the test of Darwinian natural selection—and get passed along to later generations. “The fact that these things are inheritable and they do affect survival of baby animals makes us feel like evolution is embodied exactly by these spot features.” So if a mom’s camouflage is good, her babies, too, might have the spots that keep them safer.

1. Why are baby giraffes with larger spots more likely to survive?
A.Because their mothers tend to protect them more.
B.Because they keep away from lions and hyenas.
C.Because their spots match surroundings better.
D.Because they barely move around in the bushes.
2. What does the author intend to do in paragraph 4?
A.Summarize the previous paragraphs.B.Add some background information.
C.Introduce a new topic for discussion.D.Provide evidence for the findings.
3. What does “embodied” underlined in the last paragraph mean?
A.Promoted.B.Prevented.C.Questioned.D.Represented.
4. What is the best title for the text?
A.Animals Have Their Unique Sets of Patterning
B.Derek Lee Has Been Studying Animal Patterning
C.Mom’s Genes Make Some Giraffes Hard to Spot
D.Animal Physical Characteristics Are Similar to Family’s
【知识点】 动物 科普知识 说明文

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【推荐1】It isn’t just people who get road rage. Robins, a kind of small brown European bird, in the countryside become more aggressive when they hear the sound of traffic, according to a study.

When a robin arrives uninvited on another bird’s territory, they adapt their songs to ward the rival away, and adopt visual displays including swaying from side to side and threateningly baring their red chest feathers, before closing in and even going on the attack. Previous studies had found that robins living in cities were more physically aggressive than their rural cousins. The latest research suggests that noise pollution could play a part.

To explore the connection, scientists from UK and Turkey put a 3D-printed plastic model of a robin on another robin’s place at two locations: an urban park in Istanbul that was close to busy roads, and a quiet wooded area outside the city. The model intruder (闯入者) was also equipped with recordings of robin songs. Then, through a separate speaker nearby, they added traffic noise.

“In normally quiet surroundings, we found that additional traffic noise leads to rural robins becoming more physically aggressive, for instance approaching the model bird more closely,” said Dr Çağlar Akçay, the study’s lead author. But when they played the extra traffic to the urban birds, they did not become any more aggressive-instead they responded by singing less, suggesting they had perhaps learned to “sit out” temporary increases in noise.

Akçay and his team believed that the traffic noise was interfering with robins’ natural communication through song. “The high levels of noise that exist day and night in urban habitats, such as from traffic or construction equipment, may permanently interfere with the efficient transmission of acoustic (声音的) signals and this is likely to be the key reason why urban robins are typically more aggressive than rural birds,” he said.

1. What kind of bird are robins?
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2. How did the scientists conduct the study?
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C.By comparing robins’ different responses.D.By recording the model intruder’s behavior.
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A.Sing not as frequently as usual.B.Ward the rival away by singing more.
C.Sway more violently from side to side.D.Approach the model bird more closely.
4. What is Akçay’s attitude to the future of robins?
A.Unclear.B.Indifferent.C.Optimistic.D.Concerned.
2023-06-23更新 | 86次组卷
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【推荐2】The tickbird and the giraffe have a connection relationship that some scientists describe as win-win relationship and some as parasitism (寄生). This interspecies partnership is imbalanced in favor of the giraffe because it can live without the tickbird, while the tickbird is dependent on the giraffe for food resource.

The giraffe is a large mammal that lives in Africa along with other large grass-eaters. All these and many others host the tickbird. This bird has long been thought to remove ticks (扁虱) from its host, to the benefit of both—the bird eats the ticks, and the host is relieved of blood-sucking, disease-carrying insects—but recent studies reveal that this process is less than good. A secondary benefit to a host from the tickbirds’ presence is a sort of early warning system, since the birds make a loud sound if they sight an enemy. This is of less benefit to the giraffe than to other hosts because the giraffe has the advantage of great height and keen eyesight and is fully capable of spotting predators without the bird’s assistance. The tickbird is likely of greater benefit in this capacity to the nearsighted rhino.

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