4. Which of the following is true of both T cells and B cells? a. They are produced from stem cells of the bone marrow.
b. They can attack and destroy invading pathogens.
c. They are an important part of the inflammatory response.
d. They respond to pathogens circulating in the bloodstream.
e. They produce antibodies.

The table presents the average day and night temperatures in five cities. it also reveals whether a city receives substantial rainfall (wet climate) or little rainfall (dry climate). which city’s rocks are likeliest to experience frost wedging, and why? a) city a because the consistently subzero temperature would prevent water from melting b) city b because it is a wet region and the temperature fluctuates around the freezing point c) city c because it receives plenty of rain fall and the weather is moderately cool d) city d because the hot and dry weather would cause rocks to absorb water