Which of these is NOT a form of air pollution?

carbon dioxide

ozone at ground level

ash from a volcano

VOCs from cleaning supplies

Which direction does the energy flow in this energy pyramid ?

You want to cultivate some exotic plants at your farm. however, the climate is chillier than the temperature range favorable to the crop. which is the best method to use for the cultivation of this exotic crop? a. use a crop rotation method b. use a lot of fertilizer c. prepare the seed bed properly d. use a greenhouse e. use irrigation

Which feature would you expect to find in a population in which sexual selection depends on male competition?