Câu hỏi:
20/04/2022 1,740
Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
Most desert animals will drink water if confronted with it, but many of them never have any opportunity. All living things must have water, or they will expire. The herbivores find it in desert plants. The carnivores slake their thirst with the flesh and blood of living prey. One of the most remarkable adjustments, however, has been made by the tiny kangaroo rat, who not only lives without drinking but subsists on a diet of dry seeds containing about 5% free water. Like other animals, he has the ability to manufacture water in his body by a metabolic conversion of carbohydrates. But he is notable for the parsimony with which he conserves his small supply by every possible means, expending only minuscule amounts in his excreta and through evaporation from his respiratory tract.
Investigation into how the kangaroo rat can live without drinking water has involved various experiments with these small animals. Could kangaroo rats somehow store water in their bodies and slowly utilize these resources in the long periods when no free water is available from dew or rain? The simplest way to settle this question was to determine the total water content in the animals to see if it decreases as they are kept for long periods on a dry diet. If they slowly use up their water, the body should become increasingly dehydrated, and if they begin with a store of water, this should be evident from an initial high water content. Results of such experiments with kangaroo rats on dry diets for more than 7 weeks showed that the rats maintained their body content during the long period of water deprivation. When the kangaroo rats were given free access to water, they did not drink water. They did nibble on small pieces of watermelon, but this did not change appreciably the water intent in their bodies, which remained at 66.3% to 67.2% during this period.
This is very close to the water content of dry-fed animals (66.5%), and the availability of free water, therefore, did not lead to any “storage” that could be meaningful as a water reserve. This makes it reasonable to conclude that physiological storage of water is not a factor in the kangaroo rat’s ability to live on dry food.
What is the topic of this passage?
Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
Most desert animals will drink water if confronted with it, but many of them never have any opportunity. All living things must have water, or they will expire. The herbivores find it in desert plants. The carnivores slake their thirst with the flesh and blood of living prey. One of the most remarkable adjustments, however, has been made by the tiny kangaroo rat, who not only lives without drinking but subsists on a diet of dry seeds containing about 5% free water. Like other animals, he has the ability to manufacture water in his body by a metabolic conversion of carbohydrates. But he is notable for the parsimony with which he conserves his small supply by every possible means, expending only minuscule amounts in his excreta and through evaporation from his respiratory tract.
Investigation into how the kangaroo rat can live without drinking water has involved various experiments with these small animals. Could kangaroo rats somehow store water in their bodies and slowly utilize these resources in the long periods when no free water is available from dew or rain? The simplest way to settle this question was to determine the total water content in the animals to see if it decreases as they are kept for long periods on a dry diet. If they slowly use up their water, the body should become increasingly dehydrated, and if they begin with a store of water, this should be evident from an initial high water content. Results of such experiments with kangaroo rats on dry diets for more than 7 weeks showed that the rats maintained their body content during the long period of water deprivation. When the kangaroo rats were given free access to water, they did not drink water. They did nibble on small pieces of watermelon, but this did not change appreciably the water intent in their bodies, which remained at 66.3% to 67.2% during this period.
This is very close to the water content of dry-fed animals (66.5%), and the availability of free water, therefore, did not lead to any “storage” that could be meaningful as a water reserve. This makes it reasonable to conclude that physiological storage of water is not a factor in the kangaroo rat’s ability to live on dry food.
What is the topic of this passage?
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Trả lời:
Đáp án A
Kiến thức: Đọc hiểu - ý chính
Giải thích:
Chủ đề của đoạn văn này là gì?
A. Chuột túi Þ từ khóa “kangaroo rats” được nhắc đến rất nhiều lần trong bài.
B. Nước trong sa mạc
C. Cuộc sống trên sa mạc
D. Thí nghiệm sinh lý
=> các ý B, C, D chỉ là chi tiết nhỏ trong bài; toàn bộ bài nói về chuột túi và sự tích trữ nước của chúng qua những thí nghiệm.
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CÂU HỎI HOT CÙNG CHỦ ĐỀ
Lời giải
Đáp án A
Kiến thức: Rút gọn mệnh đề quan hệ
Giải thích:
Mệnh đề quan hệ có thể được rút gọn về dạng P2 (quá khứ phân từ) nếu mang nghĩa bị động.
Dạng đầy đủ: Applications which / that are sent in after 30 April will not be considered.
Dạng rút gọn: Application sent in after 30 April will not be considered.
Tạm dịch: Các đơn xin việc gửi sau ngày 30 tháng 4 sẽ không được xem xét.Lời giải
Đáp án C
Kiến thức: Từ vựng
Giải thích:
A. complete (v): hoàn thành B. find (v): tìm thấy
C. compete (v): cạnh tranh, đấu lại D. exist (v): tồn tại
Some animals go extinct because they cannot (40) compete with other animals for food.
Tạm dịch: Một số loài động vật bị tuyệt chủng vì chúng không thể cạnh tranh thức ăn với các loài động vật khác.Lời giải
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Lời giải
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Lời giải
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Lời giải
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