-
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 questions from 36 to 42
The most desert animals will drink water if confronted with it, for many of them the opportunity never comes. Yet 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. 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 weight. There was no trend toward a decrease in water 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 content 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.
Câu hỏi:What is the main idea of this article?
- A. Kangaroo rats and it’s life on dry food
- B. Water in the desert for animals
- C. Desert life of kangaroo rat
- D. Physiological experiments on animals
Lời giải tham khảo:
Đáp án đúng: A
A. Chuột kangaroo và cuộc sống nhờ thức ăn khô
Câu hỏi này thuộc đề thi trắc nghiệm dưới đây, bấm vào Bắt đầu thi để làm toàn bài
Hướng dẫn Trắc nghiệm Online và Tích lũy điểm thưởng
CÂU HỎI KHÁC
- Indicate the word whose underlined part differs from the other three in pronunciation: submits, consults, returns, reacts
- Indicate the word whose underlined part differs from the other three in pronunciation: young, plough, couple, cousin
- Indicate the word that differs from the other three in the position primary stress: offer, reduce, persuade, apply
- Indicate the word that differs from the other three in the position of primary stress: endanger, departure, determine, furniture
- Many Vietnamese people ______ their lives for the revolutionary cause of the nation
- He said he had not discussed the matter with her. ______, he had not even contacted her
- You have a ticket to the match tomorrow, ______
- My father has worked as a journalist ______
- The International Red Cross helps to ensure respect for the human being, and to prevent and relieve human ______.
- If I ______ to bed early, I could have got up in time and caught the train the next day.
- I ______ my former teacher for over 10 years.
- Some researchers have just ______ a survey of young peoples points of view on contractual marriage
- Bob has a bad lung cancer and his doctor has advised him to ______ smoking
- It is worthwhile ______ those old bits of string because they could be of some use later
- The director retired early ______ ill-health
- He has not been offered the job because he cannot ______ the requirements of the company
- The little girl ______ with my son in the living room is my brother’s daughter.
- The best way to learn a musical instrument is to find ______ enthusiastic teacher.
- You have to take any job you can get—you cant ______ and choose.
- Her style of dress accentuated her extreme slenderness
- Shopping on the internet can be safe if you follow a few simple rules.
- She decided to remain celibate and devote her life to helping the homeless
- Driver are advised to get enough petrol because filling stations are few and far between on the highway
- - Would you like some more chicken?”- ______ I’m full”.
- - Do you think they will fail in the examination?”- No, ______”
- Voluntary work helps foster independence and imparts the ability to
- thus teaching people how to work their way through different systems
- And in the absence of
- It demonstrates a willingness to learn and an independent spirit
- volunteering can act as a
- Which is the main idea of the passagee
- Which of the following is NOT true about whales’ being similar to humans?
- The word tiny” in paragraph 3 mostly means ______.
- According to the passage, the frozen ice on the sea surface was dangerous to whales because ______.
- The word they” in paragraph 3 refers too
- What is the main idea of this article
- The word expire” in paragraph 1 is closest in meaning to ______.
- The word it” in paragraph 1 refer to ______.
- Which of the following is NOT true about the kangaroo rat, according to the passage?
- According to paragraph 2, what is the result of the experiments with kangaroo rats?
- The word deprivation” in paragraph 2 is closest in meaning to ______.
- According to the passage, what allows desert animals to exist with little or no water?
- Jack usually cycle to work to avoid traffic jams at rush hour.
- I would like you to clean your room, wash your clothes and preparing the dinner.
- Species become extinct or endangerment for a number of reasons, but the primary cause
- Her mother cooks much better than her.
- I will learn to use this software soon,” Tom said.
- Perhaps some of the students will be absent today.
- You can drink some beer. Make sure you don’t get drunk.
- They arrived at the market. The announcement then started.