Which of the following describes the sequence of color changes that lantana blossom undergo?

A. Red to purple

B. Yellow to orange to red

C. Red to yellow to white

D. White to red

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Đáp án B
Thông tin ở đoạn 2 của bài:
For example, on the lantana plant, a flower starts out on the first day as yellow, when it is rich with pollen and nectar. Influenced by an as-yetunidentified environmental signal, the flower changes color by triggering the production of the pigment anthromyacin. It turns orange on the second day and red on the third.
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CÂU HỎI HOT CÙNG CHỦ ĐỀ

Câu 1

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

Fungi are a group of organisms that, despite being plants, have no leaves or flowers. In fact, fungi do not even share the green colour that most other plants display. Scientists estimate that there are over 1.5 million different species of fungi in the world. Though, to date, only 100.000 have been identified, leaving many more that have not been found. One interesting feature of fungi is that they often interact with oilier organisms in order to survive. These relationships are at times beneficial to both organisms. Other times, the fungus benefits without causing harm to the other organism. Many types of fungus have beneficial relationships with plants. Initially many gardeners would be concerned to know that their plants were colonised by a fungus. This is because some fungi can cause plants to die. In fact, the Irish potato famine was caused by a fungus that killed entire crops of potatoes. However, many plants actually depend on certain types of fungi to help it stay healthy. Fungi are important to plants because they help plants absorb more minerals from the soil than they could on their own. The reason for this has to do with how fungi obtain food. Unlike green plants, fungi cannot make their own food. They must absorb their food. When the fungi absorb minerals from the soil, they draw the nutrients closer to the roots of the plants, so the plant is able to use them as well. The fungus also benefits from this relationship. Using the minerals from the soil, as well as sunlight, the plants is able to produce sugars and other nutrients. Then the fungus absorbs the nutrients from plant roots and uses them to survive. Not all relationships are beneficial for both organisms: in some interactions, only the fungus benefits. Still, for some fungus species, contact with other organisms is essential. And though the fungi do not provide any benefits for the other organism, they do not harm it either. One example of this is a species called Pilobolus. This fungus relies on other animals to help it reproduce. The Pilobolus grows in animal dung. When it becomes mature, it shoots its spores away from the dung pile. The spores land in the grass where cows graze. The spores are consumed by the animal but do not grow while inside the stomach. They travel through the body of the animal until they are passed and deposited in another area, where they continue to grow.

It can be inferred from paragraph 1 that___________

A. Many species of fungi have yet to be discovered

B. Fungi do harm to the organism they interact with

C. Fungi can have green or dull brown colors

D. There are 100,000 species of fungi left no identity

Lời giải

Đáp án A
Giải thích: Thông tin “Though, to date, only 100.000 have been identified, leaving many more that have not been found”: Tuy nhiên, để xác định, chỉ có 100,000 loại được xác định danh tính, để lại nhiều loại vẫn chưa được xác định ⇒ Có nhiều loại nấm vẫn chưa được xác định ⇒ D sai, A đúng

Câu 2

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

Traditional methods of teaching no longer suffice in this techological world. Currently there are more than 100,000 computers in schoolrooms in the United States. Students mediocre and bright alike, from the first stage through high school not only are not intimidated by my computers, but have become avid participants in the computer epoch. Kids operating computer implement their curriculum with great versatility. A music student can program musical notes so that the computer will play Beethoven or the Beatles. For a biology class, the computer can produce a picture of the intricate envisage human biology in a profound way. A nuclear reactor is no longer an enigma to students who can see its workings in minute detail on a computer. In Wisconsi, the Chippewa Indians are studying their ancient and almost forgotten language with the aid of a computer. More commonly, the computer is used for drilling math and language concepts so that youngsters may learn at their own speed without trying the patience of their human teachers. The simplest computers aid the handicapped, who learn more rapidly from the computer than from humans. Once irksome, remedial drills and exercises now on computer are conducive to learning because the machine responds to correct answers with praise and to incorrect answers with frowns and even an occasional tear. Adolescents have become so exhilarated by computers that they have developed their own jargon, easily understood by their peers but leaving their disconcerted parents in the dark. They have shown so much fervor for computer that they have formed computer clubs, beguile their leisure hours in computer stores, and even attend computer camps. A Boy Scout can get a computer merit badge. One ingenious young student devised a computer game for Atari will earn him $100,000 in royalties This is definitely the computer age. Manufacturers of computers are presently getting tax write – offs for donating equipment to colleges and universities and are pushing for legislation to obtain further deductions for contributions to elementary and high school. Furthermore, the price of computer for home or office is being sold for less than $100. At that price every class in the country will soon have computer kids.

The expression “traditional methods of teaching” is the first sentence refers to ______

A. technological methods of teaching

B. teachers who punish students for not learning

C. teachers, textbooks and class drills

D. teaching the three Rs i.e readung, wrting and arithmetic

Lời giải

Đáp án C

Giải thích: Thông tin nằm ở: “Traditional methods of teaching no longer suffice in this technological world”: Biện pháp học truyền thống không còn thích hợp với thế giới công nghệ này nữa ⇒ A sai Đáp án B và D không có thông tin trong bài Nhắc về giáo viên, sách bài tập và luyện tập nhưng có máy tính hỗ trợ để học tập tốt hơn như “More commonly, the computer is used for drilling math and language concepts so that youngsters may learn at their own speed without trying the patience of their human teachers” : Phổ biến hơn, máy tính được sử dụng để luyện tập những khái niệm toán học và ngôn ngữ để mà người trẻ có thể học tùy theo tốc độ của mình mà không phải kiên nhẫn với giáo viên

⇒ Việc học truyền thống là giáo viên, sách bài tập và luyện tập trên lớp

Câu 3