Which of the following best describes a food web?

a series of organisms that are all dependent on one other organism for food
groups of producers that are not eaten by any consumers
predators that must leave an ecosystem to hunt for food
several food chains in an ecosystem that are connected

When listening the levels of orginization in orginisims from the smallest to most complex , which level is just below organs in complexity

In an experiment examining the effects tai chi on arthritis pain, callahan (2010) selected a large sample of individuals with doctor-diagnosed arthritis. half of the participants immediately began a tai chi course and the other half (the control group) waited 8 weeks before beginning. at the end of 8 weeks, the individuals who had experienced tai chi had less arthritis pain that those who had not participated in the course.

Both destructive and constructive, the natural event seen here, is important in destroying and creating landforms on earth. what is this event called? a) deposition b) flooding c) landslide d) sedimentation