In is needed to create a chemical reaction.

a)carbon dioxide

b)nitrogen

c)oxygen

Which type of respiration takes place when there is no oxygen present? a. anaerobic b. mitochondrial c. cellular d. aerobica. anaerobic

What processes would you expect to be key in the production of yogurt ?

If the dimensions of a cube-shaped cell with a length, height, and width of 1 micrometer were to double, what would be the cell's new ratio of surface area to volume? a.3 to 1 b.4 to 3 c.1 to 2 d1 to 6