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:
Explanation:
producers are the only group capable of making their own food, they are Autotrophic, meaning they create food on a cellular level, all other organisms that are not autotrophi, are heterotrophic organisms, these must gain energy by consuming other animals
C would be the best choice
Dark occur in the stroma, and do not use light energy
More condensation nuclei, more cloud formation and precipitation are the results of spraying aerosols into the atmosphere.
<h3>What are the effects of aerosols on clouds?</h3>
Aerosols greatly influence clouds formation and its growth. Water droplets gather readily around particles which provides a particle-rich atmosphere that promotes cloud formation.
So we can conclude that more condensation nuclei, more cloud formation and precipitation are the results of spraying aerosols into the atmosphere.
Learn more about cloud here: brainly.com/question/19057393
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The answer is d you are welcome
