Left or Right Reading Answers

Feb 2, 2023

Left or Right Reading Answers is an IELTS GT reading topic. Left or Right Reading Answers is taken from Cambridge IELTS 10 Student's Book with Answers. Left or Right Reading Answers contains a total of 8 paragraphs. Related to the paragraphs are 13 questions. To answer the questions provided in the IELTS Reading passage, applicants must attentively read each passage. Left or Right Reading Answers comprise two types of questions: Choose the correct letter and one word only. To gain proficiency, candidates can practice from the IELTS reading practice test.

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Section 1

Read the Passage to Answer the Following Questions

Left or Right Reading Answers

Creatures across the animal kingdom have a preference for one foot, eye or even antenna. The cause of this trait, called lateralisation, is fairly simple: one side of the brain, which generally controls the opposite side of the body, is more dominant than the other when processing certain tasks. This does, on some occasions, let the animal down, such as when a toad fails to escape from a snake approaching from the right, just because its right eye is worse at spotting danger than its left. So why would animals evolve a characteristic that seems to endanger them?
For many years it was assumed that lateralisation was a uniquely human trait, but this notion rapidly fell apart as researchers started uncovering evidence of lateralisation in all sorts of animals. For example, In the 1970s. Lesley Rogers, now at the University of New England in Australia, was studying memory and learning in chicks.
She had been injecting a chemical into chicks’ brains to stop them learning how to spot grains of food among distracting pebbles, and was surprised to observe that the chemical only worked when applied to the left hemisphere of the brain. That strongly suggested that the right side of the chicks brain played little or no role in the learning of such behaviours. Similar evidence appeared in songbirds and rats around the same time, and since then, researchers have built up an impressive catalogue of animal lateralisation.
In some animals, lateralisation is simply a preference for a single paw or foot, while in others it appears in more general patterns of behaviour. The left side of most vertebrate brains, for example, seems to process and control feeding. Since the left hemisphere processes input from the right side of the body, that means animals as diverse as fish, toads and birds are more likely to attack prey or food items viewed with their right eye. Even humpback whales prefer to use the right side of their jaws to scrape sand eels from the ocean floor.
Genetics plays a part in determining lateralisation, but environmental factors have an impact too. Rogers found that a chick’s lateralisation depends on whether it is exposed to light before hatching from its egg – if it is kept in the dark during this period, neither hemisphere becomes dominant. In 2004, Rogers used this observation to test the advantages of brain bias in chicks faced with the challenge of multitasking.
She hatched chicks with either strong or weak lateralisation, then presented the two groups with food hidden among small pebbles and the threatening shape of a fake predator flying overhead. As predicted, the birds incubated in the light looked for food mainly with their right eye, while using the other to check out the predator. The weakly-lateralized chicks, meanwhile, had difficulty performing these two activities simultaneously.
Similar results probably hold true for many other animals. In 2006, Angelo Bisazza at the University of Padua set out to observe the differences in feeding behaviour between strongly- lateralized and weakly-lateralized fish. He found that strongly-lateralized individuals were able to feed twice as fast as weakly-lateralized ones when there was a threat of a predator looming above them. Assigning different jobs to different brain halves may be especially advantageous for animals such as birds or fish, whose eyes are placed on the sides of their heads. This enables them to process input from each side separately, with different tasks in mind.
And what of those animals who favour a specific side for almost all tasks? In2009,MariaMagat and Culum Brown at Macquarie University in Australia wanted to see if there was a general cognitive advantage in lateralisation. To investigate, they turned to parrots, which can be either strongly right- or left-footed, or ambidextrous (without dominance). The parrots were given the intellectually demanding task of pulling a snack on a string up to their beaks, using a coordinated combination of claws and beak. The results showed that the parrots with the strongest foot preferences worked out the puzzle far more quickly than their ambidextrous peers.
A further puzzle is why are there always a few exceptions, like left-handed humans, who are wired differently from the majority of the population? Giorgio Vallortigora and Stefano Ghirlanda of Stockholm University seem to have found the answer via mathematical models. These have shown that a group of fish is likely to survive a shark attack with the fewest casualties if the majority turn together in one direction while a very small proportion of the group escape in the direction that the predator is not expecting.
This imbalance of lateralisation within populations may also have advantages for individuals. Whereas most co-operative interactions require participants to react similarly, there are some situations – such as aggressive interactions – where it can benefit an individual to launch an attack from an unexpected quarter. Perhaps this can portly explain the existence of left-handers in human societies. It has been suggested that when it comes to hand-to-hand fighting, left-handers may have the advantage over the right-handed majority. Where survival depends on the element of surprise, it may indeed pay to be different.

Section 2

Solution and Explanation

QUESTIONS 27-30

Complete each sentence with the correct ending. A-F, below.

lateralisation is more common in some species than in others.

it benefits a population if some members have a different lateralisation than the majority.
lateralisation helps animals do two things at the same time.
lateralisation is not confined to human beings.
the greater an animal’s lateralisation, the better it is at problem-solving.
strong lateralisation may sometimes put groups of animals in danger.

Answer: D
Supporting Sentence: For many years it was assumed that lateralisation was a uniquely human trait
Keywords: lateralisation, uniquely human trait, sorts of animals.
Keyword Location: Paragraph B, line 1
Explanation: Paragraph B in the passage mentions that for many years, it was believed that lateralization was a characteristic that only humans possessed. When researchers began finding evidence of lateralization in a variety of species, this belief quickly crumbled. For instance, during the 1970s. Lesley Rogers was researching memory and learning in chicks while she was a student at the University of New England in Australia. Hence option D is the correct answer.

Question 28:

Answer: C
Supporting Sentence: This notion rapidly fell apart as researchers started uncovering evidence of lateralisation in all sorts of animals.
Keywords: lateralisation, uniquely human trait, sorts of animals.
Keyword Location: Paragraph B, line 1
Explanation: Paragraph B in the passage mentions that for many years, it was believed that lateralization was a characteristic that only humans possessed. When researchers began finding evidence of lateralization in a variety of species, this belief quickly crumbled. For instance, during the 1970s. Lesley Rogers was researching memory and learning in chicks while she was a student at the University of New England in Australia. Hence option C is the correct answer.

Question 29:

Answer: E
Supporting Sentence: This imbalance of lateralisation within populations may also have advantages for individuals.
Keywords: imbalance of lateralisation
Keyword Location: Paragraph H, line 1
Explanation: Paragraph H in the passage states that Individuals may benefit from this imbalance of lateralisation within groups. While most cooperative interactions require participants to behave similarly, there are other scenarios, such as violent interactions. Where one individual might gain by launching an assault from an unexpected direction. Hence option E is the correct answer.

Question 30:

Answer: B
Supporting Sentence: This imbalance of lateralisation within populations may also have advantages for individuals.
Keywords: imbalance of lateralisation
Keyword Location: Paragraph H, line 1
Explanation:: Individuals may benefit from this imbalance of lateralisation within groups. While most cooperative interactions require participants to behave similarly, there are other scenarios. Such as violent interactions, where one individual might gain by launching an assault from an unexpected direction.

QUESTIONS 31-35

Complete the summary below. Choose ONE WORD ONLY from the passage.

Lesley Rogers’ 2004 Experiment

Lateralisation is determined by both genetic and 31_____________ influences. Rogers found that chicks whose eggs are given 32_________________ during the incubation period tend to have a stronger lateralisation. Her 2004 experiment set out to prove that these chicks were better at 33________________ than weakly lateralized chicks. As expected, the strongly lateralized birds in the experiment were more able to locate 34 ________________ using their right eye while using their left eye to monitor an imitation 35_______________ located above them.

Question 31:

Answer: Environmental
Supporting Sentence: Genetics plays a part in determining lateralisation, but environmental factors have an impact too.
Keywords: Genetics, environmental factors
Keyword Location: Paragraph D
Explanation: Although genetics have a role in lateralisation, environmental variables also play a role. Rogers discovered that whether a chick is exposed to light before emerging from its egg influences its lateralisation. If it is kept in the dark during this time, neither hemisphere becomes dominant.

Question 32:

Answer: Light
Supporting Sentence: Rogers found that a chick’s lateralisation depends on whether it is exposed to light before hatching from its egg
Keywords: chick’s lateralisation, hatching
Keyword Location: Paragraph D
Explanation: Although genetics have a role in lateralisation, environmental variables also play a role. Rogers discovered that whether a chick is exposed to light before emerging from its egg influences its lateralisation. If it is kept in the dark during this time, neither hemisphere becomes dominant.

Question 33:

Answer: Multitasking
Supporting Sentence: Rogers used this observation to test the advantages of brain bias in chicks faced with the challenge of multitasking.
Keywords: challenge of multitasking
Keyword Location: Paragraph D
Explanation: In paragraph D, last line, the author mentions that discovery was exploited by Rogers. To investigate the benefits of brain bias in chicks faced with the problem of multitasking.Hence multitasking is the correct answer.

Question 34:

Answer: Food
Supporting Sentence: As predicted, the birds incubated in the light looked for food mainly with their right eye, while using the other to check out the predator.
Keywords: food, predator
Keyword Location: Paragraph D
Explanation: In paragraph D, the author mentions that as expected, the birds incubated in light searched for food mostly with their right eye. While using the other to assess the predator. Meanwhile, the poorly lateralized chicks struggled to accomplish these two tasks at the same time.

Question 35:

Answer: Predator
Supporting Sentence: As predicted, the birds incubated in the light looked for food mainly with their right eye, while using the other to check out the predator.
Keywords: food, predator
Keyword Location: Paragraph D
Explanation: In paragraph D, the author mentions that as expected, the birds incubated in light searched for food mostly with their right eye. While using the other to assess the predator. Meanwhile, the poorly lateralized chicks struggled to accomplish these two tasks at the same time.

QUESTIONS 36-40

Reading Passage 3 has eight paragraphs, A-H.

Which paragraph contains the following information?

description of a study which supports another scientist’s findings.

Answer: E
Supporting Sentence: In 2006, Angelo Bisazza at the University of Padua set out to observe the differences in feeding behaviour between strongly- lateralized and weakly-lateralized fish.
Keywords: differences in feeding behaviour
Keyword Location: Paragraph E
Explanation: Angelo Bisazza of the University of Padua set out in 2006 to study the variations in eating behaviour. It is between strongly and weakly lateralized fish. Hence option E is the correct answer.

the suggestion that a person could gain from having an opposing lateralisation to most of the population.

Answer: H
Supporting Sentence: This imbalance of lateralisation within populations may also have advantages for individuals.
Keywords: imbalance of lateralisation
Keyword Location: Paragraph H, line 1
Explanation: Paragraph H in the passage states that Individuals may benefit from this imbalance of lateralisation within groups. While most cooperative interactions require participants to behave similarly, there are other scenarios, such as violent interactions. Where one individual might gain by launching an assault from an unexpected direction. Hence option E is the correct answer.

reference to the large amount of knowledge of animal lateralisation that has accumulated.

Answer: B
Supporting Sentence: This notion rapidly fell apart as researchers started uncovering evidence of lateralisation in all sorts of animals.
Keywords: lateralisation, uniquely human trait, sorts of animals.
Keyword Location: Paragraph B, line 1
Explanation: Paragraph B in the passage mentions that for many years, it was believed that lateralization was a characteristic that only humans possessed. When researchers began finding evidence of lateralization in a variety of species, this belief quickly crumbled. For instance, during the 1970s. Lesley Rogers was researching memory and learning in chicks while she was a student at the University of New England in Australia. Hence option B is the correct answer.

research findings that were among the first to contradict a previous belief.

Answer: B
Supporting Sentence: Lesley Rogers, now at the University of New England in Australia, was studying memory and learning in chicks.
Keywords: studying memory and learning in chicks
Keyword Location: Paragraph B, last line
Explanation: Paragraph B in the passage mentions Lesley Rogers, currently at Australia's University of New England. he was researching memory and learning in chicks. Hence option B is the correct answer.

a suggestion that lateralisation would seem to disadvantage animals.

Answer: A
Supporting Sentence: The cause of this trait, called lateralisation, is fairly simple: one side of the brain, which generally controls the opposite side of the body, is more dominant than the other when processing certain tasks.
Keywords: trait, lateralisation
Keyword Location: Paragraph A, line 1
Explanation: The origin of this feature, known as lateralisation, is straightforward: one side of the brain, which controls the opposite side of the body. It is more dominant than the other when doing particular activities.

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