What type of cells are produced when B cells are exposed to an antigen?
A) helper T cells
B) memory T cells
C) NK cells
D) plasma cells
D
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The use of nuclear power throughout the world is generally
A) uneven, ranging from 0 to 74%, depending on the country. B) uneven, ranging from 3 to 22% in different countries around the world. C) consistent, with most developed countries generating most of the electricity with nuclear power. D) steadily declining, with most countries planning on phasing out their nuclear plants.
Non-greenhouse gases make up more than 99.9% of the dry atmosphere
a. True b. False
Earth heats the atmosphere from the bottom up, by absorbing sunlight and converting it to thermal energy and radiating heat
a. True b. False Indicate whether the statement is true or false
Soils will develop at faster rates in which of the following environments?
A) Hot and dry B) Warm and humid C) Cold and dry D) In areas where they can develop directly from bedrock, regardless of climate conditions