Question

[Lê Quỳnh Anh]

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

Which is one of the ways in which the epicuticular wax protects the plant?

A. It helps the plant to attack aggressors

B. It guards against bacteria

C. It releases gases against plant pests

D. It helps the plant to avoid excessive moisture intake

Answer 1

[Dương Hoàn Anh]

Đáp án B
Đ2: 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. Nó (the epicuticular wax) cũng bảo vệ cây cối khỏi những tấn công bên ngoài, cái mà đến từ những tác
nhân vô cơ như là các loại khí, hoặc những tác nhân hữu cơ bao gồm vi khuẩn và côn trùng cây