After Joseph Farman discovered, in 1985, that an ozone hole was developing over Antarctica, scientists measured levels of chemicals in the upper atmosphere. They found a surprising concentration of ozone-destroying:
A. chlorine
B. nitrates
C. helium
D. mercury
Answer: A
You might also like to view...
Cells are involved in the process called ____________ immunity. Activated B cells become ____________ cells which produce ____________ . T cells are involved in the ____________ immune response, directly interacting with their target cells.
Fill in the blank(s) with the appropriate word(s).
Involves aggregated data on the population level. ecologic fallacy
a. ecologic study b. case study c. repressed study d. none of the above
The diagnostic procedure that images the structures of the blood vessels and the flow of blood through these vessels is known as _________ .
Fill in the blank(s) with the appropriate word(s).
Arrange in the right order: inoculation—incubation—isolation—inspection—identification
Indicate whether the statement is true or false.