5. How does the amount of oxygen in the air compare to the amount of carbon dioxide?

How can you keep track of variables in a science experiment?

Surrounded by microtubules, located near the nucleus. (don't try to google it) (give answer only if u know)

Migration is a. the movement of organisms from a native location to a foreign location b. the movement of organisms from a foreign location to a native location the movement of organisms from their water supply to their food supply d. the seasonal movement of organisms between locations c. select the best answer from above