Answer:
1. c
2. b
3. a
I hope this is right but I am not sure for the last question tho.
The first two questions are right because I am in high school.
They have more access to development, large factories, and more cars. industrialized nations frequently have a higher population
Answer:
They are stimulated by an antigen.
Explanation:
Natural killer cells are cytotoxic cells that help our body in innate immune response. These are an critical and important component of the innate immune system of our body. These natural killer cells provide a rapid response towards the virus infected cells. These cells have capability to detect MHC that are present on the infected cells. Natural killer cells do not require activation for killing those cells which are missing MHC I. Due to this feature, they are named as the Natural killer cells. These cells can directly induce the death of tumor cells and play an important role in immunosurveillance.
Answer:What traits does the kingdom protists fall under
Explanation:
All protists are eukaryotic organisms. ...
Most protists are aquatic, others are found in moist and damp environments.
Most are unicellular, however, there are a few multicellular protists such as the giant kelp.
They may be autotrophic or heterotrophic in nature.
