I thought the answer was "nothing will happen" :/

How many trophic levels are there in the following food chain? phytoplankton - shrimp - perch - pike - osprey

Several billion years ago which gas was the least prevailant in the atmosphere

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