Diffusion takes place Group of answer choices

only through a lipid bilayer membrane.

from an area of low concentration to an area of high concentration.

from an area of high concentration to an area of low concentration.

only in liquids.

Biology 1c cumulative exam i need awsners

How can scientists test their ideas about the origin of the universe if they can't physically interact with or study?

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.