Which organelles help provide cells with energy?

a
.
mitochondria and chloroplasts
b
.
rough endoplasmic reticulum
c
.
smooth endoplasmic reticulum
d
.
Golgi apparatus and ribosomes

The transport tubes for food coming down the plants are called?

Me the formula cacl2 represents the compound

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.