Which of the following parts of the plant facilitates photosynthesis? vascular tissue
chloroplast
roots
stoma

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.

Describe characteristics of a good respitory surface

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