How does the absorption of ultraviolet radiation by the ozone layer sustain life? a. this process maintain the temperature of the earth. b. it keeps a low level of harmful ultraviolet radiation from reaching living organisms. c. this process keeps ozone concentrations in the troposphere at lower levels. d. all of the above are true.

Astudent sees several ants walking up a wall following the exact same trail that an ant took earlier. she wants to apply the scientific method to determine how the ants detected the trail. which of these steps would come first in her application of the scientific method? perform an experiment by cleaning the scent away from part of the trail. draw a conclusion that the ants follow a scent trail. make a prediction about what the ants will do after she cleans away part of the trail. hypothesize that the ants are following a scent trail that the first ant left.