plant species that are well adapted to survival in dry climates are being looked at for an answer in developing more efficient crops to grow on marginally arable lands.Plants use several mechanisms to ensure their survival in desert environments. Some involve purely mechanical and physical adaptations, such as the shape of the plant's surface, smaller leaf size, and extensive root systems. Some of the adaptations are related to chemical mechanisms. Many plants, such as cacti, have internal gums ...
Trần Đan Phương | Chat Online | |
04/09 07:28:31 (Tiếng Anh - Lớp 12) |
plant species that are well adapted to survival in dry climates are being looked at for an answer in developing more efficient crops to grow on marginally arable lands.
Plants use several mechanisms to ensure their survival in desert environments. Some involve purely mechanical and physical adaptations, such as the shape of the plant's surface, smaller leaf size, and extensive root systems. Some of the adaptations are related to chemical mechanisms. Many plants, such as cacti, have internal gums and mucilage which give them water-retaining properties. Another chemical mechanism is that of the epicuticular wax layer. This wax layer acts as an impervious cover to protect the plant. It prevents excessive loss of internal moisture. It also protects the plant from external aggression, which can come from inorganic agents such as gases, or organic agents which include bacteria and plant pests.
Researchers have proposed that synthetic waxes with similar protective abilities could be prepared based on knowledge of desert plants. If successfully developed, such a compound could be used to greatly increase a plant's ability to maintain health in such adverse situations as inadequate water supply, limited fertilizer availability, attack by pests, and poor storage after harvesting
All of the following are examples of an adverse situation for crops EXCEPT________
Lựa chọn một trả lời để xem Đáp án chính xác Báo sai đáp án hoặc câu hỏi |
A. pest aggression 0 % | 0 phiếu |
B. inadequate water 0 % | 0 phiếu |
C. insufficient fertilize 0 % | 0 phiếu |
D. proper storage 0 % | 0 phiếu |
Tổng cộng: | 0 trả lời |
Trắc nghiệm liên quan
- plant species that are well adapted to survival in dry climates are being looked at for an answer in developing more efficient crops to grow on marginally arable lands.Plants use several mechanisms to ensure their survival in desert environments. ... (Tiếng Anh - Lớp 12)
- plant species that are well adapted to survival in dry climates are being looked at for an answer in developing more efficient crops to grow on marginally arable lands.Plants use several mechanisms to ensure their survival in desert environments. ... (Tiếng Anh - Lớp 12)
- plant species that are well adapted to survival in dry climates are being looked at for an answer in developing more efficient crops to grow on marginally arable lands.Plants use several mechanisms to ensure their survival in desert environments. ... (Tiếng Anh - Lớp 12)
- plant species that are well adapted to survival in dry climates are being looked at for an answer in developing more efficient crops to grow on marginally arable lands.Plants use several mechanisms to ensure their survival in desert environments. ... (Tiếng Anh - Lớp 12)
- plant species that are well adapted to survival in dry climates are being looked at for an answer in developing more efficient crops to grow on marginally arable lands.Plants use several mechanisms to ensure their survival in desert environments. ... (Tiếng Anh - Lớp 12)
- plant species that are well adapted to survival in dry climates are being looked at for an answer in developing more efficient crops to grow on marginally arable lands.Plants use several mechanisms to ensure their survival in desert environments. ... (Tiếng Anh - Lớp 12)
- plant species that are well adapted to survival in dry climates are being looked at for an answer in developing more efficient crops to grow on marginally arable lands.Plants use several mechanisms to ensure their survival in desert environments. ... (Tiếng Anh - Lớp 12)
- plant species that are well adapted to survival in dry climates are being looked at for an answer in developing more efficient crops to grow on marginally arable lands.Plants use several mechanisms to ensure their survival in desert environments. ... (Tiếng Anh - Lớp 12)
- 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.Water scarcity is fast becoming one of the major limiting factors in world crop production. In many areas, poor ... (Tiếng Anh - Lớp 12)
- It is important that he ______ a gallon of water with him if he wants to hike to the bottom of the Grand Canyon (Tiếng Anh - Lớp 12)
Trắc nghiệm mới nhất
- Đọc thầm văn bản sau và trả lời câu hỏi: THUẦN PHỤC SƯ TỬ Ha-li-ma lấy chồng được hai năm. Trước khi cưới, chồng nàng là một người dễ mến, lúc nào cũng tươi cười. Vậy mà giờ đây, chỉ thấy chàng cau có, gắt gỏng. Không biết làm thế nào, ... (Tiếng Việt - Lớp 5)
- Tìm một số biết rằng nếu ta gấp 3 lần số đó rồi cộng với 21,5 rồi trừ đi 1,5 được kết quả là 35,9. Số đó là: (Toán học - Lớp 5)
- Số thích hợp để điền vào ô trống là: 438 : 12 + 3,5 = ? (Toán học - Lớp 5)
- Kết quả của phép tính 7,75 : 2,5 là: (Toán học - Lớp 5)
- Kết quả của phép tính 15 : 0,25 là: (Toán học - Lớp 5)
- Trong 4 giờ ô tô đi được 210 km với vận tốc không đổi. Hỏi mỗi giờ ô tô đi được bao nhiêu ki-lô-mét? (Toán học - Lớp 5)
- Cả 5 con vịt cân nặng 8 kg. Hỏi trung bình mỗi con vịt cân nặng bao nhiêu ki-lô-gam? (Toán học - Lớp 5)
- 15 căn phòng như nhau có diện tích là 1 447,5 m2. Hỏi 8 căn phòng như thế có diện tích là bao nhiêu mét vuông? (Toán học - Lớp 5)
- Một tấm thảm hình vuông có chu vi 2,4 m. Diện tích của tấm thảm đó là: (Toán học - Lớp 5)
- Sợi dây thứ nhất dài 52,5 m, sợi dây thứ hai dài bằng 110 sợi dây thứ nhất. Vậy hai sợi dây dài là: (Toán học - Lớp 5)