Phloem được cấu tạo từ hai loại tế bào là

Nếu xét 4 cặp alen nằm trên 4 cặp NST thường khác nhau Aa, Bb, Dd, Ee. Số kiểu gen của P có thể là bao nhiêu kiểu khi chúng tạo được 4 kiểu giao tử?

Read the following passage about the urban shift 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. (2,5 points)

            [I] Water is one of the most essential resources on our planet, vital for all forms of life. However, increasing demand and pollution are putting immense pressure on our freshwater supplies. [II] According to recent studies, nearly 2 billion people worldwide live in countries experiencing high water stress, leading to a decline in the availability of this precious resource. This situation not only affects drinking water but also agriculture, sanitation, and energy production.

            The primary causes of water scarcity include population growth, urbanization, and climate change. As cities expand, the demand for water increases significantly. Moreover, agricultural practices that rely heavily on water are becoming unsustainable in many regions. Climate change further exacerbates these issues, causing unpredictable weather patterns and extreme droughts, which reduce water availability.

           [III] In response to this growing crisis, everyone must prioritize water conservation. Simple actions, such as fixing leaks, using water-efficient appliances, and practicing mindful consumption, can make a significant difference. Additionally, implementing policies that promote sustainable water management and investing in technologies for water recycling can help mitigate the impacts of water scarcity. [IV]

            Despite these efforts, the challenges remain substantial. It is crucial that we recognize the importance of conserving water and take immediate steps to protect this vital resource for future generations.

Which of the following best summarises the passage?

Một vật dao động điều hòa có tần số góc là 4π (rad/s). Chu kì dao động của vật là

Các sơn nguyên ở nước ta thuận lợi phát triển ngành gì?

Đặc điểm nổi bật của nền kinh tế Việt Nam những năm cuối thế kỉ XIX – đầu thế kỉ XX là

Choose the words/ phrases that are SAME in meaning to the underlined parts.

In this round, the contestants have to form pairs and choose a song to perform with their partners.

Các câu sau đây, có bao nhiêu câu là mệnh đề?

Thiết bị điện có trong hình bên là

Mark the letter A, B, C, or D on your answer sheet to indicate the best arrangement of utterances or sentences to make a meaningful exchange or text in each of the following questions from 13 to 17 

a. Finally, difficulties in communication and forming genuine connections due to social media and technology dependence are common among teens.

b. Additionally, cyberbullying and online harassment present significant challenges in the digital age.

c. Teens often face various social challenges.

d. Firstly, peer pressure can lead to risky behaviors such as substance abuse, smoking, or involvement in harmful activities.

e. Moreover, mental health issues, including anxiety and depression, are prevalent among teenagers due to academic stress or social pressures.

We couldn’t go on a picnic as planned __________ it was raining.

Ở tế bào nhân thực, cấu trúc nào sau đây đóng vai trò kiểm soát sự vận chuyển các chất đi vào và đi ra khỏi tế bào?

Read the following passage about Global Challenges Requiring Diverse Solutions 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 18 to 22.

Climate change affects everyone on our planet, but different communities experience its impacts in unique ways. (18)_________. This traditional wisdom, which connects deeply with nature, can help us find better solutions to environmental problems. If we had started addressing climate change earlier, many environmental disasters could have been prevented. The effects of global warming are now visible in many regions around the world, from melting ice caps to increasing droughts and floods. These changes threaten not only ecosystems but also cultural practices tied to specific environments. Many coastal communities (19)_________, and ancient cultural sites are being damaged by extreme weather events. When diverse communities work together, sharing their unique perspectives and knowledge, innovative climate solutions emerge. Different cultural approaches to agriculture, water conservation, and energy use can inspire new ways of thinking about sustainability. Climate solutions must be culturally appropriate; (20)_________. By combining traditional wisdom with modern science, we create more effective strategies for addressing climate challenges. Communities around the world are already implementing these multicultural approaches, demonstrating (21)_________. People want immediate action on climate change; however, governments often move slowly on environmental policies. Scientists study climate patterns and develop new technologies, (22)_________. The path forward requires collaboration across cultures, disciplines, and borders. Only through inclusive dialogue and shared responsibility can we build a sustainable future that honors both human diversity and our common home.

Nhận xét nào sau đây là sai khi nói về quá trình truyền sóng?

Phương án nào sau đây thể hiện rõ nhất sự thay đổi về giao tiếp cộng đồng khi mạng máy tính được sử dụng rộng rãi?

Nhiệt độ sôi của rượu là 80 ^oC. Trong thang đo Kelvin, nhiệt độ này tương đương với