Thứ sáu, 15/11/2024
IMG-LOGO

Câu hỏi:

21/07/2024 91

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 true about heterotrophs? 

A. They require more energy than autotrophs

B. They are not reliant on simple sugars for energy

C. They cannot exist without the presence of autotrophs

Đáp án chính xác

D. They are mostly land-bound organisms 

Trả lời:

verified Giải bởi qa.haylamdo.com

Chọn C

Câu đề bài: Điều nào sau đây nói đúng về heterotrophs: sinh vật dị dưỡng?

 Đáp án C: Chúng không thể tồn tại mà không có sự hiện diện của autotrophs: sinh vật tự dưỡng.

Các đáp án còn lại:

A. Chúng đòi hỏi nhiều năng lượng hơn là sinh vật tự dưỡng.

B. Chúng không phụ thuộc vào các loại đường đơn cho năng lượng.

D. Chúng chủ yếu là các sinh vật gắn liền với đất liền.

Thông tin trong bài:

Many organisms cannot produce their own food and must obtain energy by eating organic matter. These are called heterotrophs. - Nhiều sinh vật không thể tự sản xuất thức ăn của mình và phải có năng lượng bằng cách ăn các chất hữu cơ. Chúng được gọi là sinh vật dị dưỡng.

Câu trả lời này có hữu ích không?

0

CÂU HỎI HOT CÙNG CHỦ ĐỀ

Câu 1:

We are all very sorry that we have to wait for this agreement to come into_________.

Xem đáp án » 27/08/2021 2,708

Câu 2:

Never_______more people _________ in charity work than now.

Xem đáp án » 27/08/2021 883

Câu 3:

Emma and Karen used to be ______ good friends that I’m surprised they don’t get on now.

Xem đáp án » 27/08/2021 671

Câu 4:

“What did Maria ask you?”

“She asked me____________I had ever been abroad.”

Xem đáp án » 27/08/2021 606

Câu 5:

“Do you fancy a drink?” –“___________”

Xem đáp án » 27/08/2021 452

Câu 6:

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.

Sacred texts and ceremonies can seem confusing with no one there to guide. Young people find an expert willing to explain their significance

Xem đáp án » 27/08/2021 308

Câu 7:

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.

He was so addicted to social networks that he quitted all other outdoor activities.

Xem đáp án » 27/08/2021 303

Câu 8:

I couldn't go into my own__________world far away and try to block out all of these problems.

Xem đáp án » 27/08/2021 285

Câu 9:

Young children often miss out__________the nutrition needed for their growing bodies, as well as the education necessary for their expanding minds.

Xem đáp án » 27/08/2021 279

Câu 10:

The message was often enhanced by a__________ drawing specifically to attract the attention of children.

Xem đáp án » 27/08/2021 237

Câu 11:

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions

I haven’t got used to Indian food although I have lived here for three months.

Xem đáp án » 27/08/2021 221

Câu 12:

Mark the letter A, B, C, or D on your answer sheet to show the underlined part that needs correction in each of the following questions.

Before the cotton gin had been invented in 1794, American famers had cheap salves remove seeds from the cotton fiber.

Xem đáp án » 27/08/2021 220

Câu 13:

If children are enjoying themselves and having fun during the activities, this is an indication that they feel at_________with the methods being used.

Xem đáp án » 27/08/2021 216

Câu 14:

Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions

Xem đáp án » 27/08/2021 204

Câu 15:

Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.

My father continued to work very hard, hoping to be promoted to the position of manager. Finally, his hard work paid off and he was promoted

Xem đáp án » 27/08/2021 192

Câu hỏi mới nhất

Xem thêm »
Xem thêm »