Which is a true statement about electromagnetic waves?

a. even though you cannot feel them, you are always being showered by them.
b. you can always feel them interacting with you.
c. electromagnetic waves are never dangerous.

What are some possible short and long term medical concerns for crew members on longer space exploration trips

What are examples of the plant life and animal life that can be found in each type of terrarium

Ineed to get this test done which of the following statements is correct in hour our immune system responds to a potential pathogen? a.) the skin will be the first line of defense, and then the many phagocytes in the bloodstream will attempt to consume the possible pathogen. b.) b cells will start reading the antigen code immediately and call t cells to assist in destroying the pathogen. c.) the adapted immune system will call on the innate immune system to destroy the pathogen. d.) the t-cells in the adapted immune systems are the first to recognize the pathogen