All of the statements about the nitrogen cycle are true except one. that is a) lightning breaks nitrogen molecules so it can combine with oxygen. b) putting man-made fertilizers on farm fields exceeds natural nitrogen levels in the soil. c) bacteria located in the soil trap excess nitrogen and to remove it from plant roots. d) although nitrogen is the most abundant atmospheric gas, plants cannot use it from the air.

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.

Which of the following substances most likely dissolve in water? check all that apply

As noted in the illustration, homo heidelbergensis was a tall, muscular hunter, who used both tools and weapons. because h. heidelbergensis was not a gatherer/forager, but ate a varied diet including meat and fish, we would expect to see what anatomical changes?