Answer:
b). activation of T cells
Explanation:
An APC (antigen-presenting cell) can be described as an immune cell, which detects, uptakes, and informs the acquired immune response when an infection takes place. B cells, macrophages, and dendritic cells are antigen-presenting cells.
These cells play an important role in activation of T cells. T cells are unable to recognize soluble or free antigens and can only recognize antigens processed and presented by carrier molecules, such as MHC molecules.
Presence of MHCII molecules is a defining feature of APCs that process and present antigens to T cells. Hence, all antigen-presenting cells help in activation of T cells.
Thus, the correct answer is option (b).
Answer:
Гліколіпід
Пояснення:
Рослини, земноводні та комахи не гинуть, коли температура їх тіла опускається нижче 0 ° C, оскільки їх організм виділяє такий матеріал, як гліколіпід (AFGL), який використовується як захист від замерзання в організмах. Гліколіпід - антифризна речовина, яка запобігає зв’язкам молекул води, і ця хімічна речовина зв’язується з молекулами води, щоб уникнути замерзання всередині клітини.
Answer: The answer is C. Order pizza and popcorn and watch more television as a family night.
Explanation: It’s C because ordering pizza and popcorn will make your diet worse and create even worse habits.
The governments of different countries are becoming more involved in protecting the environment as well as preserving biodiversity. Many different acts are issued in order to accomplish this.
One very prominent agency playing a role in this is the United States Environmental Protection Agency. This agency helps in maintaining a healthy environment for the life of earth to live in.
<h2>Answer </h2>
Moss
<u>Explanation</u>
Moss is often used as a soil conditioner. The capacity of Sphagnum to keep damp creates the moss a common soil conditioner. A soil conditioner is a material manufactured from organic matter which assists to enhance the soil's characteristics, scoring slow-releasing nutrients. It has been simply used to kill any weed seeds. Mosses are small flowerless plants that typically develop in thick green clumps or mats usually in damp or dark areas.
