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 24 to 30.
Almost all living things ultimately get their energy from the sun. In a process called photosynthesis, plants, algae, and some other organisms capture the sun's energy and use it to make simple sugars such as glucose. Most other organisms use these organic molecules as a source of energy. Organic materials contain a tremendous amount of energy. As food, they fuel our bodies and those of most other creatures. In such forms as oil, gas, and coal, they heat our homes, run our factories and power our cars.
Photosynthesis begins when solar energy is absorbed by chemicals called photosynthetic pigments that are contained within an organism. The most common photosynthetic pigment is chlorophyll. The bright green color characteristic of plants is caused by it. Most algae have additional pigments that may mask the green chlorophyll. Because of these pigments, algae may be not only green but brown, red, blue or even black.
In a series of enzyme-controlled reactions, the solar energy captured by chlorophyll and other pigments is used to make simple sugars, with carbon dioxide and water as the raw materials. Carbon dioxide is one of very few carbon- containing molecules not considered to be organic compounds. Photosynthesis then converts carbon from an inorganic to an organic form. This is called carbon fixation. In this process, the solar energy that was absorbed by chlorophyll is stored as chemical energy in the form of simple sugars like glucose. The glucose is then used to make other organic compounds. In addition, photosynthesis produces oxygen gas. All the oxygen gas on earth, both in the atmosphere we breathe and in the ocean, was produced by photosynthetic organisms. Photosynthesis constantly replenishes the earth's oxygen supply.
Organisms that are capable of photosynthesis can obtain all the energy they need from sunlight and do not need to eat. They are called autotrophs. Plants are the most familiar autotrophs on land. In the ocean, algae and bacteria are the most important autotrophs. Many organisms cannot produce their own food and must obtain energy by eating organic matter. These are called heterotrophs.
Which of the following is NOT true?
A. Plants are familiar heterotrophs
B. Plants capture the sun's energy to make sugars
C. Photosynthesis produces oxygen gas
D. Organic materials contain an amount of energy
Chọn A
Câu đề bài: Câu nào sau đây Không đúng?
Đáp án A. Thực vật thường là sinh vật dị dưỡng.
Các đáp án còn lại:
B. Thực vật lấy năng lượng mặt trời để tạo ra đường.
In this process, the solar energy that was absorbed by chlorophyll is stored as chemical energy in the form of simple sugars like glucose.
Trong quá trình này, năng lượng mặt trời được hấp thụ bởi chất diệp lục được lưu trữ dưới dạng năng lượng hóa học dưới dạng các loại đường đơn giản như glucose.
C. Quang hợp tạo ra khí oxy.
In addition, photosynthesis produces oxygen gas.
Ngoài ra, quang hợp tạo ra khí oxy.
D. Vật liệu hữu cơ chứa một lượng năng lượng.
Thông tin trong bài:
Many organisms cannot produce their own food and must obtain energy by eating organic matter.
Nhiều sinh vật không thể tự sản xuất thức ăn của mình và phải có năng lượng bằng cách ăn các chất hữu cơ.