Trong thí nghiệm chứng minh thân vận chuyển nước, nếu cắm cành hoa hồng trắng vào dung dịch màu tím thì

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the best answer to each of the following questions from 31 to 40.

Biting into a ripe, juicy fruit brings a smile to many people’s faces. But eating that same fruit a week before it is ripe probably wouldn’t be as enjoyable! Unripe fruits are often hard and bitter, but that serves a purpose. The hard exterior of an unripe fruit protects the developing seed inside. After a seed fully develops inside the fruit, the fruit changes color, softens, and gets sweeter to become more attractive to animals and humans. These organisms eat the fruit and spread its seeds, ensuring the plant’s survival and regrowth.

But how does a fruit ripen? The ripening process involves many complex chemical reactions. When a fruit ripens, it goes through a chemical change. A chemical change happens when bonds within molecules break, and the atoms that once formed them regroup into new molecules. Chemical changes are irreversible. Once a fruit ripens, it cannot become unripe again.

One molecule responsible for this chemical change is ethylene. Ethylene (C2H4) is a colorless gas made up of carbon and hydrogen atoms. (I). It is a naturally occurring molecule in the atmosphere. (II). It is also an important plant hormone. (III). Plants release ethylene through the growing tips of roots, flowers, and ripening fruit. (IV). Although ethylene serves other purposes in plants, one of its main purposes is to trigger the chemical reactions that cause fruits to ripen. As the fruit matures, oxygen in the air helps stimulate the production of ethylene. This ethylene production is a signal that begins fruit ripening. For that reason, unripe fruits have low levels of ethylene, while ripe fruits have higher levels of ethylene. Most fruits produce ethylene and respond to ethylene in the atmosphere.

Although fruits require ethylene to ripen, different types of fruits respond to this molecule in two distinct ways: non-climacteric fruits and climacteric fruits. Non-climacteric fruits do not ripen after harvesting. They produce very little ethylene of their own. Climacteric fruits, on the other hand, continue to ripen after they are picked. These fruits produce a large amount of ethylene. Climacteric fruits can also speed up the ripening process of other fruits nearby since they release high levels of ethylene into the air.  

According to the passage, which of the following statements is TRUE?

Quốc hội thể hiện quyền kiểm soát các cơ quan trong bộ máy Nhà nước Cộng hoà xã hội chủ nghĩa Việt Nam như thế nào?

Phương án nào sau đây không thuộc ưu điểm của cơ chế thị trường?

Công nghệ nào được ứng dụng đồng bộ trong sản xuất nông nghiệp?

Tiền đề về chính trị của các cuộc cách mạng tư sản là

Công nghệ nào sau đây giúp các máy móc kết nối với nhau?

Trong thí nghiệm giao thoa sóng trên mặt nước, hai nguồn A, B dao động cùng pha với cùng tần số . Tại một điểm M cách các nguồn A, B lần lượt là , thì sóng có biên độ cực đại. Giữa M và đường trung trực của AB không có dãy cực đại khác. Tốc độ truyền sóng trên mặt nước là

Đâu là các phân tử sinh học chính của cơ thể người?

Chọn ý đúng: Phương pháp phân tích và tổng hợp phân tích ưu nhược điểm và tổng hợp ra giải pháp mới được sử dụng ở bước?

Để thực hiện mô hình quản lí danh sách tên quận/huyện của các tỉnh thành phố em phải xác định mối quan hệ giữa?

Bản Hiến chương Liên hợp quốc đã được thông qua khi cuộc Chiến tranh thế giới thứ hai:

Một loài sinh vật có bộ NST lưỡng bội 2n = 8. Số lượng NST trong một tế bào của loài này ở kì giữa của giảm phân II là gì?

Một con lắc lò xo có chu kì dao động riêng . Tác dụng các lực cưỡng bức biến đổi tuần hoàn theo phương trùng với trục của lò xo. Lực cưỡng bức nào dưới đây làm cho con lắc dao động mạnh nhất?

Read the following advertisement about a new travel platform and mark the letter A, B, C or D on your answer sheet to indicate the option that best fits each of the numbered blanks from 1 to 6.

FAQ ON FINDING TRAVEL BUDDY

What is the concept of finding a travel buddy at Join My Trip?

You can find a travel buddy by joining trips hosted by (1) ________, whom we call Trip Leaders. The trips are (2) ________ handpicked and curated, offering you the best experience you can't find anywhere else. The Trip Leaders will be (3) ________ charge of these trips, from designing the itinerary (4) ________ the way. Furthermore, Trip Leaders will accept travelers, (5) ________ Trip Mates, on their trips and travel together. So, by joining our trips, you can be (6) ________ with other amazing travelers from all over the world.

Cư dân của nền văn hóa nào đã mở đầu cho nền nông nghiệp sơ khai ở Việt Nam?

Read the passage carefully

1. No matter who we are or where we are from, we only have 24 hours each day to get things done. Some people seem to make the most of their time, using it to achieve their goals and dreams. Others feel that life is passing them by and they aren’t accomplishing anything. If you are in the latter group, it is not too late to turn things around. By implementing a few simple hacks, you can start getting better results very quickly.

2. If you want to become more productive, it pays to learn about the Pareto principle (which is also known as the 80-20 rule). It states that for most tasks, 80 percent of the results we get come from 20 percent of the work we do. For example. 80 percent of the company sales usually come from 20 percent of customers. Therefore, the trick is to focus your efforts on the key 20 percent of actions that truly matter to greatly improve your results.

3. In some cases, people may be busy from morning to night but still seem to get nothing done. In this situation, the problem might be that clear goals haven’t been set. To fix this, set some time aside to list the things you want to achieve in life. Then, select the top three or four that you want to focus on for the next year. Look at your goals every night before bedtime and ask yourself what are the next actions to accomplish each day. Then, promise yourself that you will finish these tasks no matter how busy you get. If possible try completing the tasks first thing in the morning so you are assured of success.

4. Another common mistake regarding productivity is not considering our energy levels. If we try to work around the clock, we will eventually get tired and quit. Everyone needs time to sleep, eat, socialize with friends, and unwind from the stress of the day. To make sure you don’t burn out, be sure to schedule some time for breaks and fun activities into your schedule every day. Finally, no matter how difficult your goals may seem, remember the old saying that “a journey of a thousand miles begins with a single step”.

Which of the following statements does the author support most?

Read the following advertisement about a new travel platform and mark the letter A, B, C or D on your answer sheet to indicate the option that best fits each of the numbered blanks from 1 to 6.

FAQ on Finding Travel Buddy

What is the concept of finding a travel buddy at Join MyTrip?

You can find a travel buddy by joining trips hosted by (1) ________, whom we call TripLeaders. The trips are (2) ________ handpicked and curated, offering you the best experience you can't find anywhere else. The TripLeaders will be (3) ________ charge of these trips, from designing the itinerary (4) ________ the way. Furthermore, TripLeaders will accept travelers, (5) ________ TripMates, on their trips and travel together. So, by joining our trips, you can (6) ________ with other amazing travelers from all over the world.

Một vật rơi tự do từ độ cao h xuống đất. Công thức tính vận tốc của vật khi chạm đất là

Phương án nào sau đây chỉ gồm các thiết bị vào?